This document discusses primary eye care and the role of ophthalmic officers. It defines primary eye care as the promotion of eye health, prevention and treatment of conditions leading to vision loss, and rehabilitation for the blind. The key activities of primary eye care are outlined as creating awareness, prevention through behaviors and environment, curative activities like treating common eye diseases, and rehabilitation for the incurably blind. Ophthalmic officers are defined as the primary eye care professionals dedicated to vision care. They specialize in eye exams, diagnosis, management of visual disorders, and have roles in hospitals and communities by providing services like refraction, vision therapy, and detection and referral of eye pathology.
This document discusses the history and optics of the retinoscope, an instrument used in eye examinations to objectively determine a patient's refractive error. It describes how early models used spots or streaks of light and how modern streak retinoscopes work. The retinoscopist can control the orientation and vergence of the emitted light streak and uses this to evaluate the patient's refractive state based on the appearance of the light reflected from their retina. Neutralization retinoscopy involves keeping the retinoscope at a fixed distance while changing the light vergence to determine the refractive error that produces a neutralized reflex from the patient's eye.
Real pediatric refraction and spectacle power prescriptionSrijana Lamichhane
This document discusses pediatric refraction and spectacle prescription. It begins with background information on the development of the eye in childhood and importance of early detection and management of refractive errors. It then covers topics such as age groups in pediatrics, emmetropization, objectives of pediatric refraction, challenges, changes in refractive error with age, types of pediatric refraction including near retinoscopy, static retinoscopy, and cycloplegic refraction. Cycloplegic refraction is emphasized as the standard approach, with discussion of indications, principles, drugs used, and example calculations.
It describes about the procedure of Hess charting. it serves as a great tool to understand the concepts involved. Suitable for optometry course. This is not a routine procedure but an important procedure which is used in diagnosis.
This document discusses objective refraction techniques, primarily retinoscopy. It begins by explaining the principles of retinoscopy, including far point concept and how different ametropias affect the far point. It then describes the components and optics of the retinoscope, how it works, and retinoscopy techniques. Key aspects covered include neutralization, prerequisites for retinoscopy, and problems that can occur. Autorefractometry is also briefly discussed. In under 3 sentences:
Retinoscopy is the primary objective refraction technique discussed, which uses a retinoscope to illuminate the retina and observe the movement of the red reflex to determine the refractive error, neutralizing with trial lenses. The document covers the optics
This document discusses various options for correcting presbyopia with contact lenses, including bifocal, monovision, and multifocal lenses. Bifocal lenses have simultaneous vision designs like concentric, aspheric, and diffractive lenses or alternating/translating designs. Monovision fits one eye for distance and one for near. Factors in fitting presbyopic contact lenses include visual requirements, occupation, binocularity, medication, and tear film status. Fitting requires assessing balance of distance and near vision and allowing adaptation time, with patient education crucial. Presbyopia correction with contact lenses provides an alternative to bifocal glasses but requires careful patient screening and management of expectations.
This document discusses retinal correspondence and abnormal retinal correspondence. It defines retinal correspondence as the relationship between paired retinal visual cells in the two eyes that allows for single binocular vision. Abnormal retinal correspondence occurs when the fovea of one eye corresponds to an extrafoveal area in the other eye, resulting in eccentric fixation but maintained binocular vision. The document describes tests to assess normal versus abnormal retinal correspondence, including the Bagolini striated glasses test, red filter test, and Hering-Bielschowsky after-image test.
This document discusses frame adjustment and quality checking. It describes 7 off-face adjustments including x-ing, temple spread, pantoscopic angle, temple fold angle, pad angles, face form, and 4-point touch. It also discusses 7 on-face adjustments including horizontal alignment, vertex distance, frame height, segment height, temple bend, pad contact, and skin/lash clearance. Key details are provided about properly adjusting specific angles and alignments during the fitting process.
The synaptophore is a device used to measure binocular vision anomalies. It consists of two optical tubes that can be adjusted horizontally, vertically, and torsionally. Various slides are used for diagnostic and treatment purposes to measure deviations, fusion, stereopsis, and retinal correspondence. Key measurements include the objective and subjective angles of deviation in different gazes, as well as the fusional ranges in horizontal, vertical, and torsional planes. Suppression can also be detected and mapped out. Precise adjustments of the tubes allow customized orthoptic treatment of binocular vision disorders.
This document discusses the history and optics of the retinoscope, an instrument used in eye examinations to objectively determine a patient's refractive error. It describes how early models used spots or streaks of light and how modern streak retinoscopes work. The retinoscopist can control the orientation and vergence of the emitted light streak and uses this to evaluate the patient's refractive state based on the appearance of the light reflected from their retina. Neutralization retinoscopy involves keeping the retinoscope at a fixed distance while changing the light vergence to determine the refractive error that produces a neutralized reflex from the patient's eye.
Real pediatric refraction and spectacle power prescriptionSrijana Lamichhane
This document discusses pediatric refraction and spectacle prescription. It begins with background information on the development of the eye in childhood and importance of early detection and management of refractive errors. It then covers topics such as age groups in pediatrics, emmetropization, objectives of pediatric refraction, challenges, changes in refractive error with age, types of pediatric refraction including near retinoscopy, static retinoscopy, and cycloplegic refraction. Cycloplegic refraction is emphasized as the standard approach, with discussion of indications, principles, drugs used, and example calculations.
It describes about the procedure of Hess charting. it serves as a great tool to understand the concepts involved. Suitable for optometry course. This is not a routine procedure but an important procedure which is used in diagnosis.
This document discusses objective refraction techniques, primarily retinoscopy. It begins by explaining the principles of retinoscopy, including far point concept and how different ametropias affect the far point. It then describes the components and optics of the retinoscope, how it works, and retinoscopy techniques. Key aspects covered include neutralization, prerequisites for retinoscopy, and problems that can occur. Autorefractometry is also briefly discussed. In under 3 sentences:
Retinoscopy is the primary objective refraction technique discussed, which uses a retinoscope to illuminate the retina and observe the movement of the red reflex to determine the refractive error, neutralizing with trial lenses. The document covers the optics
This document discusses various options for correcting presbyopia with contact lenses, including bifocal, monovision, and multifocal lenses. Bifocal lenses have simultaneous vision designs like concentric, aspheric, and diffractive lenses or alternating/translating designs. Monovision fits one eye for distance and one for near. Factors in fitting presbyopic contact lenses include visual requirements, occupation, binocularity, medication, and tear film status. Fitting requires assessing balance of distance and near vision and allowing adaptation time, with patient education crucial. Presbyopia correction with contact lenses provides an alternative to bifocal glasses but requires careful patient screening and management of expectations.
This document discusses retinal correspondence and abnormal retinal correspondence. It defines retinal correspondence as the relationship between paired retinal visual cells in the two eyes that allows for single binocular vision. Abnormal retinal correspondence occurs when the fovea of one eye corresponds to an extrafoveal area in the other eye, resulting in eccentric fixation but maintained binocular vision. The document describes tests to assess normal versus abnormal retinal correspondence, including the Bagolini striated glasses test, red filter test, and Hering-Bielschowsky after-image test.
This document discusses frame adjustment and quality checking. It describes 7 off-face adjustments including x-ing, temple spread, pantoscopic angle, temple fold angle, pad angles, face form, and 4-point touch. It also discusses 7 on-face adjustments including horizontal alignment, vertex distance, frame height, segment height, temple bend, pad contact, and skin/lash clearance. Key details are provided about properly adjusting specific angles and alignments during the fitting process.
The synaptophore is a device used to measure binocular vision anomalies. It consists of two optical tubes that can be adjusted horizontally, vertically, and torsionally. Various slides are used for diagnostic and treatment purposes to measure deviations, fusion, stereopsis, and retinal correspondence. Key measurements include the objective and subjective angles of deviation in different gazes, as well as the fusional ranges in horizontal, vertical, and torsional planes. Suppression can also be detected and mapped out. Precise adjustments of the tubes allow customized orthoptic treatment of binocular vision disorders.
Pattern strabismus occurs when there is a change in the magnitude of horizontal deviation between up and down gaze. The most common types are A pattern (convergence in up gaze) and V pattern (divergence in up gaze). Pattern strabismus can be caused by abnormalities of vertical or horizontal muscle action, anatomical anomalies, disorders of muscle innervation, or anomalous muscle insertions. Evaluation involves measuring the deviation in different gazes using cover-uncover testing and Hess screening. Management may involve adaptation or surgery tailored to the specific pattern, which aims to improve alignment and binocular function.
Eccentric fixation occurs when an amblyopic eye fixes on a point other than the fovea. It is important to diagnose as it impacts visual acuity and treatment. Eccentric fixation can be evaluated using several tests including the corneal light reflex test, ophthalmoscopy, after image transfer, and perimetry. Treatment may involve occlusion of the good eye combined with use of a red filter over the amblyopic eye to encourage central fixation. Careful monitoring of fixation behavior is important for guiding amblyopia treatment.
Indirect ophthalmoscopy allows examination of the peripheral fundus and posterior pole. It should be used when examining patients with symptoms suggesting retinal abnormalities or those with systemic diseases affecting the retina. Indirect ophthalmoscopy involves placing a high-power convex lens in front of the eye to form a real, inverted image of the fundus. There are two methods: monocular uses a handheld lens and provides an erect image, while binocular allows stereoscopic viewing. Proper technique involves dilating the pupil and using a condensing lens held near the eye to view the magnified retinal image.
Keratometry is a technique used to measure the curvature of the anterior surface of the cornea. It works by reflecting light off the cornea's convex surface and measuring the size of the reflected image to calculate the radius of curvature. The cornea acts as a convex mirror. Keratometry is important for assessing corneal astigmatism, estimating refractive error, monitoring conditions like keratoconus, and calculating intraocular lens power. Factors like improper calibration, positioning, focusing, or corneal irregularities can introduce errors in keratometry measurements.
- Toric soft contact lenses are used to correct astigmatism by containing a cylindrical component that standard soft lenses do not have. They maintain the correct orientation in the eye to provide clear vision.
- Toric lenses are fitted using a trial lens method where the patient wears diagnostic lenses to determine the proper prescription accounting for any rotation. The final prescription is adjusted based on the measured rotation of the trial lens.
- A proper fitting toric lens will have full corneal coverage, good centration, stable orientation, and comfortable vision. Care involves using multipurpose solutions and proper insertion/removal to avoid damage.
This document discusses various refractive errors including astigmatism, aniseikonia, and anisometropia. It defines astigmatism as a refractive error where light fails to come to a single focus on the retina due to unequal refraction in different meridians. It describes the different types of regular and irregular astigmatism. Aniseikonia is defined as an anomaly of binocular vision where the ocular images are unequal in size or shape. Anisometropia is when the total refraction of the two eyes is unequal. The document discusses the symptoms, investigations, and treatment options for these refractive errors including spectacles, contact lenses, and refractive surgery.
This document compares and contrasts AS-OCT (anterior segment optical coherence tomography) and ultrasound biomicroscopy (UBM) imaging techniques for evaluating the anterior eye segment.
It discusses that AS-OCT provides non-contact, high resolution cross-sectional imaging of the anterior segment structures without touching the eye. UBM uses high frequency ultrasound to generate detailed 2D images of the anterior segment, allowing visualization of structures like the iris and angle.
While both techniques allow qualitative and quantitative assessment of the anterior chamber angle and structures, AS-OCT has advantages of being non-contact, faster imaging, and less operator dependency compared to UBM. However, UBM can image deeper into the posterior iris and has greater penetration than
Real subjective refraction in astigmatismBipin Koirala
1) The document discusses subjective refraction techniques for astigmatism, including determining the spherical and cylindrical corrections.
2) Key steps include controlling accommodation, finding the monocular best sphere using VA or bichrome tests, and determining the cylindrical component using fogging with targets like clock dials or Jackson cross cylinders.
3) The axis of the cylindrical correction must match the axis of the patient's astigmatism to fully correct their refractive error.
Therapeutic contact lenses are used for therapeutic, diagnostic and cosmetic purposes to treat various ocular surface diseases and conditions. They provide mechanical protection and support to the cornea, maintain corneal epithelial hydration, and can be used to deliver medications to the eye. The type of therapeutic contact lens chosen depends on the specific condition being treated and should aim to maximize oxygen to the cornea unless the eye has no vision. Common complications include ocular redness, minor corneal edema and lens deposits which require regular follow up visits.
This include a brief explanation of the clinical refraction methods in the eye examination procedure. In order to get the full video download the ppt. it includes a lot of important things
This document discusses various challenges that can be encountered when performing retinoscopy, which is an objective method for determining a patient's refractive error. It describes six common problems such as a dim reflex, media opacities, scissor reflex, large pupils, accommodative fluctuations, and examining patients with strabismus or nystagmus. For each challenge, potential causes are provided as well as solutions such as using off-axis retinoscopy, varying the working distance, or performing cycloplegic refraction. The document also lists possible sources of inaccurate retinoscopy findings and stresses the importance of verifying the endpoint.
The Worth Four Dot test is used to assess binocular vision. It presents four lights - red, green, green, white - through red-green glasses. The test checks for suppression or diplopia by asking the patient to report the number, color, and position of lights seen. Abnormal responses can indicate conditions like strabismus, suppression in one eye, or vertical/horizontal diplopia from deviations. The test is inexpensive and easy to perform but relies on subjective patient responses.
Rigid gas permeable (RGP) contact lenses are rigid plastic lenses that transmit oxygen. They have inherent rigidity like PMMA but are semi-soft due to oxygen permeability. RGP lenses provide clearer vision than soft lenses, are more durable, and less expensive. However, they require an adaptation period and have a higher risk of dislodging than soft lenses. Key design features of RGP lenses include the back surface design, thickness, edge configuration, and diameter, which affect lens fit, movement, comfort, and vision. RGP lenses are used to correct astigmatism and presbyopia and for conditions like keratoconus.
This document discusses low vision aids and their use for people with visual impairments. It defines low vision according to the WHO and describes common causes of visual dysfunction like macular degeneration and glaucoma. The goals of low vision rehabilitation are to maintain and improve visual function through clinical assessment and optometric intervention. Low vision aids can be optical devices like magnifying glasses, telescopes, or non-optical devices that alter lighting, contrast and size of objects. Common optical devices discussed include magnifying spectacles, hand magnifiers, stand magnifiers, and telescopes.
The document discusses pantoscopic tilt, which is when the bottom of eyeglass frames are angled toward the cheeks. It describes how proper pantoscopic tilt helps maximize the amount of bridge surface resting on the nose. The document also mentions retroscopic tilt, when the bottom of frames is angled away from the cheeks, and orthoscopic tilt, when frames have no angle. Additionally, it explains how lens tilt improves how glasses look and function for patients, and depends on ear and nose bridge heights, requiring frames to be properly adjusted for individual wearers before measurements.
The document discusses the process of optical dispensing, including defining optical dispensing, measuring frames and lenses, selecting frames based on facial shapes, lens materials and coatings, and the process of laying off, cutting, and edging lenses to fit into frames. Key steps include determining facial measurements, selecting appropriate frames, measuring pupillary distance, marking lenses, cutting lenses to shape using hand or automatic edgers, and fitting the finished lenses into frames.
The document discusses various congenital cranial dysinnervation disorders (CCDDs) that cause errors in ocular and facial muscle innervation, including Duane Retraction Syndrome (DRS) and Brown Syndrome. DRS is caused by abnormal innervation of the lateral rectus muscle by the oculomotor nerve, resulting in globe retraction on attempted adduction. Brown Syndrome is caused by restriction of the superior oblique tendon at the trochlear pulley, limiting elevation in adduction. The document reviews the anatomy, physiology, clinical features, types, associations, and management of these CCDDs.
Non - surgical treatment of squint i.e. all types of squint have some modalities of treatment [ optical treatment, orthoptic treatment, Prismo-therapy, and pharmacological treatment] except surgical treatment.
1. OPTICAL TREATMENT -
in optical treatment, it should be include correction of refractive error and prismotherapy.
SPECTACLES should be prescribed in every cases.
It may correct to squint partially or completely.
IN PRISMOTHERAPY, for correction of squint, This is light weight, and easy to apply on the back surface of glass.
It is useful in heterophoria, nystagmus, convergence insufficiency, managing diplopia and maintain binocular single vision.
IN PHARMACOLOGICAL TREATMENT, miotics, atropine and botulinum toxin are prescribed in some types of cases of strabismus.
IN ORTHOPTIC TREATMENT, means straight eyes.
It is used as a diagnostic purpose and therapeutic purposes.
- to increase fusion amplitude.
- anti suppression exercises.
- treatment of amblyopia.
- treatment of abnormal retinal correspondance.
- to control deviations.
ORDER OF ORHOPTIC TREATMENT -
. amblyopia is treated firstly.
. anti- suppression therapy.
- diplopia training.
- amplitude improvement.
Dissociated vertical deviation (DVD) is a condition where one eye turns upward when the other eye fixes. It typically presents between ages 2-5 years and is often associated with infantile esotropia. DVD violates the rules of ocular motility as the deviating eye does not make a rapid movement to refixate. Measurement and tests like Bielschowsky's phenomenon and red glass testing help differentiate DVD from other vertical deviations. Treatment involves observation, encouraging bifixation, or surgery like superior rectus recession if the deviation is increasing. It is important to differentiate DVD from inferior oblique overaction.
National Programme for Control of BlindnessKEM Hospital
This document discusses community ophthalmology and the burden of blindness in India. It provides an overview of community ophthalmology, which aims to provide accessible eye care services. The main causes of blindness in India are cataract (62.6%), refractive error (19.7%), and corneal blindness (0.9%). National programs like the National Programme for Control of Blindness and Vision 2020 aim to reduce blindness. The NPCB focuses on increasing cataract surgeries and screening/treating refractive errors in schoolchildren.
1. Approximately 285 million people worldwide have visual impairments, with 246 million having low vision and 39 million being blind.
2. The leading causes of blindness are cataract (62%), refractive error (19.7%), and glaucoma (5.8%).
3. In India, there are 7.8 million blind people and 45 million with low vision, accounting for 20% of the world's blind population.
4. The National Programme for Control of Blindness was launched in 1976 with the goal of reducing blindness prevalence from 1.4% to 0.3% by 2020 through strengthening eye care services, training human resources, and increasing public awareness.
Pattern strabismus occurs when there is a change in the magnitude of horizontal deviation between up and down gaze. The most common types are A pattern (convergence in up gaze) and V pattern (divergence in up gaze). Pattern strabismus can be caused by abnormalities of vertical or horizontal muscle action, anatomical anomalies, disorders of muscle innervation, or anomalous muscle insertions. Evaluation involves measuring the deviation in different gazes using cover-uncover testing and Hess screening. Management may involve adaptation or surgery tailored to the specific pattern, which aims to improve alignment and binocular function.
Eccentric fixation occurs when an amblyopic eye fixes on a point other than the fovea. It is important to diagnose as it impacts visual acuity and treatment. Eccentric fixation can be evaluated using several tests including the corneal light reflex test, ophthalmoscopy, after image transfer, and perimetry. Treatment may involve occlusion of the good eye combined with use of a red filter over the amblyopic eye to encourage central fixation. Careful monitoring of fixation behavior is important for guiding amblyopia treatment.
Indirect ophthalmoscopy allows examination of the peripheral fundus and posterior pole. It should be used when examining patients with symptoms suggesting retinal abnormalities or those with systemic diseases affecting the retina. Indirect ophthalmoscopy involves placing a high-power convex lens in front of the eye to form a real, inverted image of the fundus. There are two methods: monocular uses a handheld lens and provides an erect image, while binocular allows stereoscopic viewing. Proper technique involves dilating the pupil and using a condensing lens held near the eye to view the magnified retinal image.
Keratometry is a technique used to measure the curvature of the anterior surface of the cornea. It works by reflecting light off the cornea's convex surface and measuring the size of the reflected image to calculate the radius of curvature. The cornea acts as a convex mirror. Keratometry is important for assessing corneal astigmatism, estimating refractive error, monitoring conditions like keratoconus, and calculating intraocular lens power. Factors like improper calibration, positioning, focusing, or corneal irregularities can introduce errors in keratometry measurements.
- Toric soft contact lenses are used to correct astigmatism by containing a cylindrical component that standard soft lenses do not have. They maintain the correct orientation in the eye to provide clear vision.
- Toric lenses are fitted using a trial lens method where the patient wears diagnostic lenses to determine the proper prescription accounting for any rotation. The final prescription is adjusted based on the measured rotation of the trial lens.
- A proper fitting toric lens will have full corneal coverage, good centration, stable orientation, and comfortable vision. Care involves using multipurpose solutions and proper insertion/removal to avoid damage.
This document discusses various refractive errors including astigmatism, aniseikonia, and anisometropia. It defines astigmatism as a refractive error where light fails to come to a single focus on the retina due to unequal refraction in different meridians. It describes the different types of regular and irregular astigmatism. Aniseikonia is defined as an anomaly of binocular vision where the ocular images are unequal in size or shape. Anisometropia is when the total refraction of the two eyes is unequal. The document discusses the symptoms, investigations, and treatment options for these refractive errors including spectacles, contact lenses, and refractive surgery.
This document compares and contrasts AS-OCT (anterior segment optical coherence tomography) and ultrasound biomicroscopy (UBM) imaging techniques for evaluating the anterior eye segment.
It discusses that AS-OCT provides non-contact, high resolution cross-sectional imaging of the anterior segment structures without touching the eye. UBM uses high frequency ultrasound to generate detailed 2D images of the anterior segment, allowing visualization of structures like the iris and angle.
While both techniques allow qualitative and quantitative assessment of the anterior chamber angle and structures, AS-OCT has advantages of being non-contact, faster imaging, and less operator dependency compared to UBM. However, UBM can image deeper into the posterior iris and has greater penetration than
Real subjective refraction in astigmatismBipin Koirala
1) The document discusses subjective refraction techniques for astigmatism, including determining the spherical and cylindrical corrections.
2) Key steps include controlling accommodation, finding the monocular best sphere using VA or bichrome tests, and determining the cylindrical component using fogging with targets like clock dials or Jackson cross cylinders.
3) The axis of the cylindrical correction must match the axis of the patient's astigmatism to fully correct their refractive error.
Therapeutic contact lenses are used for therapeutic, diagnostic and cosmetic purposes to treat various ocular surface diseases and conditions. They provide mechanical protection and support to the cornea, maintain corneal epithelial hydration, and can be used to deliver medications to the eye. The type of therapeutic contact lens chosen depends on the specific condition being treated and should aim to maximize oxygen to the cornea unless the eye has no vision. Common complications include ocular redness, minor corneal edema and lens deposits which require regular follow up visits.
This include a brief explanation of the clinical refraction methods in the eye examination procedure. In order to get the full video download the ppt. it includes a lot of important things
This document discusses various challenges that can be encountered when performing retinoscopy, which is an objective method for determining a patient's refractive error. It describes six common problems such as a dim reflex, media opacities, scissor reflex, large pupils, accommodative fluctuations, and examining patients with strabismus or nystagmus. For each challenge, potential causes are provided as well as solutions such as using off-axis retinoscopy, varying the working distance, or performing cycloplegic refraction. The document also lists possible sources of inaccurate retinoscopy findings and stresses the importance of verifying the endpoint.
The Worth Four Dot test is used to assess binocular vision. It presents four lights - red, green, green, white - through red-green glasses. The test checks for suppression or diplopia by asking the patient to report the number, color, and position of lights seen. Abnormal responses can indicate conditions like strabismus, suppression in one eye, or vertical/horizontal diplopia from deviations. The test is inexpensive and easy to perform but relies on subjective patient responses.
Rigid gas permeable (RGP) contact lenses are rigid plastic lenses that transmit oxygen. They have inherent rigidity like PMMA but are semi-soft due to oxygen permeability. RGP lenses provide clearer vision than soft lenses, are more durable, and less expensive. However, they require an adaptation period and have a higher risk of dislodging than soft lenses. Key design features of RGP lenses include the back surface design, thickness, edge configuration, and diameter, which affect lens fit, movement, comfort, and vision. RGP lenses are used to correct astigmatism and presbyopia and for conditions like keratoconus.
This document discusses low vision aids and their use for people with visual impairments. It defines low vision according to the WHO and describes common causes of visual dysfunction like macular degeneration and glaucoma. The goals of low vision rehabilitation are to maintain and improve visual function through clinical assessment and optometric intervention. Low vision aids can be optical devices like magnifying glasses, telescopes, or non-optical devices that alter lighting, contrast and size of objects. Common optical devices discussed include magnifying spectacles, hand magnifiers, stand magnifiers, and telescopes.
The document discusses pantoscopic tilt, which is when the bottom of eyeglass frames are angled toward the cheeks. It describes how proper pantoscopic tilt helps maximize the amount of bridge surface resting on the nose. The document also mentions retroscopic tilt, when the bottom of frames is angled away from the cheeks, and orthoscopic tilt, when frames have no angle. Additionally, it explains how lens tilt improves how glasses look and function for patients, and depends on ear and nose bridge heights, requiring frames to be properly adjusted for individual wearers before measurements.
The document discusses the process of optical dispensing, including defining optical dispensing, measuring frames and lenses, selecting frames based on facial shapes, lens materials and coatings, and the process of laying off, cutting, and edging lenses to fit into frames. Key steps include determining facial measurements, selecting appropriate frames, measuring pupillary distance, marking lenses, cutting lenses to shape using hand or automatic edgers, and fitting the finished lenses into frames.
The document discusses various congenital cranial dysinnervation disorders (CCDDs) that cause errors in ocular and facial muscle innervation, including Duane Retraction Syndrome (DRS) and Brown Syndrome. DRS is caused by abnormal innervation of the lateral rectus muscle by the oculomotor nerve, resulting in globe retraction on attempted adduction. Brown Syndrome is caused by restriction of the superior oblique tendon at the trochlear pulley, limiting elevation in adduction. The document reviews the anatomy, physiology, clinical features, types, associations, and management of these CCDDs.
Non - surgical treatment of squint i.e. all types of squint have some modalities of treatment [ optical treatment, orthoptic treatment, Prismo-therapy, and pharmacological treatment] except surgical treatment.
1. OPTICAL TREATMENT -
in optical treatment, it should be include correction of refractive error and prismotherapy.
SPECTACLES should be prescribed in every cases.
It may correct to squint partially or completely.
IN PRISMOTHERAPY, for correction of squint, This is light weight, and easy to apply on the back surface of glass.
It is useful in heterophoria, nystagmus, convergence insufficiency, managing diplopia and maintain binocular single vision.
IN PHARMACOLOGICAL TREATMENT, miotics, atropine and botulinum toxin are prescribed in some types of cases of strabismus.
IN ORTHOPTIC TREATMENT, means straight eyes.
It is used as a diagnostic purpose and therapeutic purposes.
- to increase fusion amplitude.
- anti suppression exercises.
- treatment of amblyopia.
- treatment of abnormal retinal correspondance.
- to control deviations.
ORDER OF ORHOPTIC TREATMENT -
. amblyopia is treated firstly.
. anti- suppression therapy.
- diplopia training.
- amplitude improvement.
Dissociated vertical deviation (DVD) is a condition where one eye turns upward when the other eye fixes. It typically presents between ages 2-5 years and is often associated with infantile esotropia. DVD violates the rules of ocular motility as the deviating eye does not make a rapid movement to refixate. Measurement and tests like Bielschowsky's phenomenon and red glass testing help differentiate DVD from other vertical deviations. Treatment involves observation, encouraging bifixation, or surgery like superior rectus recession if the deviation is increasing. It is important to differentiate DVD from inferior oblique overaction.
National Programme for Control of BlindnessKEM Hospital
This document discusses community ophthalmology and the burden of blindness in India. It provides an overview of community ophthalmology, which aims to provide accessible eye care services. The main causes of blindness in India are cataract (62.6%), refractive error (19.7%), and corneal blindness (0.9%). National programs like the National Programme for Control of Blindness and Vision 2020 aim to reduce blindness. The NPCB focuses on increasing cataract surgeries and screening/treating refractive errors in schoolchildren.
1. Approximately 285 million people worldwide have visual impairments, with 246 million having low vision and 39 million being blind.
2. The leading causes of blindness are cataract (62%), refractive error (19.7%), and glaucoma (5.8%).
3. In India, there are 7.8 million blind people and 45 million with low vision, accounting for 20% of the world's blind population.
4. The National Programme for Control of Blindness was launched in 1976 with the goal of reducing blindness prevalence from 1.4% to 0.3% by 2020 through strengthening eye care services, training human resources, and increasing public awareness.
Rudra Narayan Chowdhury presented a document summarizing blindness and related national programs in India. The document defined blindness according to WHO criteria and discussed the magnitude of visual impairment worldwide and in India. It identified the major causes of blindness as cataract, glaucoma, and uncorrected refractive errors globally and cataract as the leading cause in India. The national program for control of blindness was launched in 1976 with the goal of reducing blindness prevalence, and Vision 2020 is a global initiative to reduce avoidable blindness by 2020.
Blindness is defined as visual acuity less than 3/60 by Snellen's chart. Globally, it is estimated that 180 million people are visually impaired, of which 45 million are blind. In India, 68 lakh people are blind according to WHO statistics. The major causes of blindness globally are cataract (19 million), glaucoma (6.4 million), trachoma (5.7 million), and childhood blindness (more than 1.5 million). In India, the primary causes are cataract (62.6%), refractive errors (19.7%), and glaucoma (5.8%). The National Program for Control of Blindness aims to reduce blindness to 0.3%
This document discusses school eye health in Nigeria, outlining the current situation and future prospects. It begins by establishing children's rights to healthcare, nutrition, education, and guidance. Schools provide an opportunity to deliver comprehensive eye care services to students. The benefits of school eye health programs include correcting refractive errors, identifying other vision issues, and educating teachers. An ideal program incorporates screening, referral, treatment, health promotion, education, and follow-up. The goals of school eye health align with sustainable development goals like reducing poverty and improving health, education, gender equality, and reducing inequalities. Comprehensive programs are needed to address Nigeria's eye health challenges and maximize the impact of school eye health initiatives.
Community Ophthalmology - Blindness, Different Plans and their outcomeagasthya2k19
This document discusses community ophthalmology and the National Programme for Control of Blindness (NPCB) in India. It provides an overview of the NPCB, including its objectives to reduce blindness prevalence, component activities, and organizational structure. Major causes of blindness in India are discussed, as well as goals and initiatives under the NPCB in the 12th five-year plan to further reduce blindness and expand eye care services.
This document summarizes a program that provided training to caregivers of visually impaired seniors. The program was run by Envision Rehabilitation Center and aimed to educate caregivers on age-related vision loss, coping strategies, and how to access vision rehabilitation services. Over two years the program held 44 training sessions reaching at least 493 caregivers. Surveys found the training greatly benefited participants and increased referrals to vision rehabilitation services by 40%.
Primary eye care is a vital component of primary health care that focuses on promoting eye health, preventing and treating conditions that could lead to vision loss, and rehabilitating those who are blind. The goals of primary eye care are to make eye care services more accessible across communities by integrating them into primary health care systems and nationwide blindness prevention programs. Primary eye care activities include creating awareness, prevention through identifying and treating common eye diseases, performing curative activities like first aid and referrals, and providing rehabilitation services. Ophthalmic officers can successfully provide primary eye care through screening, identifying and treating common eye diseases, performing refractions, dispensing glasses, making referrals, and conducting health education and outreach in communities.
Sightsavers is a non-profit organization founded by Sir John Wilson with a vision of eliminating preventable blindness globally by 2020. The document outlines key facts about blindness including that 37 million people are blind worldwide and 75% of cases are avoidable. It also summarizes Sightsavers' programs in cataract surgery, river blindness, trachoma, childhood blindness, low vision, inclusive education and community-based rehabilitation in 33 countries. Sightsavers works with ministries of health, local NGOs, and organizations for the blind to provide eye care services and build capacity.
Vision screening and organising eye camps RimiSreeDas
Vision screenings and eye camps are important for detecting vision problems and eye diseases early. Vision screenings can identify vision issues but do not diagnose underlying causes, while comprehensive eye exams performed by professionals can detect serious conditions. Community health workers play a key role in primary eye care by conducting screenings and organizing eye camps. They help increase access to services, especially in remote areas, by referring patients for treatment. Different types of eye camps focus on various services like cataract surgery or comprehensive care. Proper organization, community participation, and monitoring are important for the success of eye camps.
This document discusses sight loss as a public health priority in the UK. Key points:
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Niramaya Charitable Trust is a grassroots NGO dedicated to providing free, high-quality eye care to underserved communities in India. It operates on a "hub and spoke" model, conducting primary, secondary, and tertiary care through outreach programs, vision centers, and a base hospital. Its goals are to eliminate preventable blindness by 2020 and restore vision to millions through initiatives like cataract surgery, eye banking, and mobile clinics. The organization has benefited over 300,000 people and aims to expand its network of services across Haryana.
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The National Programme for Control of Blindness (NPCB) was launched in 1976 with the goal of reducing blindness prevalence to 0.3% by the year 2020. India was the first country in the world to launch National Level Blindness Control Programme.
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This document discusses blindness, its definitions, types, causes, prevention and management. It defines blindness as visual acuity of less than 3/60 in the better eye. The two main types are partial and complete blindness. The leading causes globally are cataract, trachoma, leprosy and vitamin A deficiency. In India, the major causes are cataract, uncorrected refractive errors, and glaucoma. Prevention involves primary, secondary, and tertiary eye care as well as specific programs targeting conditions like trachoma. Management depends on the underlying cause, such as surgery for cataract or nutritional changes for deficiencies.
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Ophthalmic officers Association Maharashtra
1. GOVT. OPHTHALMIC OFFICER’S
ASSOCIATION, MAHARASHTRA (INDIA)
(REG. NO: N.G.P. 4373)
CODE OF ETHICS
“VISION of VISIONARY’S”“VISION of VISIONARY’S”“VISION of VISIONARY’S”“VISION of VISIONARY’S”
“Working together to eliminate avoidable blindness”
Ophthalmic officers
GOVT. OPHTHALMIC OFFICER’S
ASSOCIATION, MAHARASHTRA (INDIA)
(REG. NO: N.G.P. 4373)
PROFESSION
AND
CODE OF ETHICS
“VISION of VISIONARY’S”“VISION of VISIONARY’S”“VISION of VISIONARY’S”“VISION of VISIONARY’S”
Working together to eliminate avoidable blindness”
Ophthalmic officers
Giving Sight
GOVT. OPHTHALMIC OFFICER’S
ASSOCIATION, MAHARASHTRA (INDIA)
Working together to eliminate avoidable blindness”
2. “One of the basic human right is the Right to see. We
have ensure that no citizen goes blind needlessly, or
being blind does not remain so, if by reasonable
development of skill and recourses , his sight can be
prevented from deteriorating ,or if already lost. Can
be restored”
Central council of health & Family welfare Govt.
of India , April 1975)
Honored to support the
Advancement of professional
Ethics in Primary Eye care profession
3. Blindness and Vision Impairment: Global Facts
According to
WORLD HEALTH ORGANISATION
Approximately 314 million people worldwide live with serious vision impairment
Of these, 45 million people are blind and 124 million have low vision Also
included, 153 million people are vision impaired due to uncorrected refractive
errors (near-sightedness, far-sightedness or astigmatism). In most cases, normal
vision could be restored with eyeglasses or contact lenses
Yet 80% of blindness is avoidable - i.e. treatable and/or preventable 90% of
blind people live in low-income countries Restorations of sight, and blindness
prevention strategies are among the most cost-effective interventions in health
care Infectious causes of blindness are decreasing as a result of public health
interventions and socio-economic development. Blinding trachoma now affects
fewer than 80 million people, compared to 360 million in 1985 Aging populations
and lifestyle changes mean that chronic blinding conditions such as diabetic
retinopathy are projected to rise exponentially Women face a significantly
greater risk of vision loss than men Without effective, major intervention, the
number of blind people worldwide has been projected to increase to 76 million
by 2020
Sight test and glasses could dramatically improve the lives of 150 million people with
poor vision A simple sight test and eyeglasses or contact lenses could make a dramatic
difference to the lives of more than 150 million people who are suffering from poor
vision. Children fail at school, adults are unable to work and families are pushed into
poverty as a result of uncorrected visual impairment.
153 million people around the world have uncorrected refractive errors (more commonly
known as near-sightedness, far-sightedness and astigmatism). Refractive errors can be
easily diagnosed, measured and corrected with eyeglasses or contact lenses, yet
millions of people in low and middle income countries do not have access to these basic
services.
Without appropriate optical correction, millions of children are losing educational
opportunities and adults are excluded from productive working lives, with severe
economic and social consequences. Individuals and families are frequently pushed into
a cycle of deepening poverty because of their inability to see well. At least 13 million
children (age 5 to 15) and 45 million working-age adults (age 16 to 49) are affected
globally. Fully 90% of all people with uncorrected refractive errors live in low and middle
income countries.
4. WHO previously estimated that 161 million people were visually impaired from eye
diseases such as cataract, glaucoma and macular degeneration. Uncorrected refractive
errors were not included in these earlier estimates. These latest WHO estimates add to
the previous number and effectively double the estimated total number of visually-
impaired people worldwide, bringing it to some 314 million people globally. The
estimates also confirm that uncorrected refractive errors are a leading cause of visual
impairment worldwide.
As part of the VISION 2020 Global Initiative to eliminate avoidable visual impairment
and blindness worldwide, WHO has been working with its partners to improve access to
affordable eye exams and eyeglasses for people in low and middle income countries.
This new information concerning the prevalence of refractive errors will strengthen the
efforts of the VISION 2020 partnership to raise awareness of the magnitude of the
problem and spur increased commitment for action.
“Correction of refractive errors is a simple and cost-effective intervention in eye care,”
said Dr Serge Resnikoff, Coordinator of WHO’s Chronic Disease Prevention and
Management unit. “Now that we know the extent of the problem of uncorrected
refractive errors, especially in low and middle income countries, we must re-double our
efforts to ensure that every person who needs help is able to receive it.”
======================
PRIMERY EYE CARE
Primary eye care is a vital component in primary health care and includes the
promotion of eye health care, the prevention and treatment of conditions that
may lead to visual loss, as well as the rehabilitation of those who are already
blind. The aim of primary eye care is to change the pattern of eye care services,
currently often limited to the central hospitals and eye units in the cities, to
countrywide blindness prevention programmers.
Primary eye care is the primary health care approach to the prevention of
blindness and it should be an integral part of primary health care. Primary health
care is defined as essential health care based on methods and technology that
are practical and scientifically sound, as well as socially acceptable; accessible
to the community, affordable for the community with good community
participation.
Primary eye care activities
Creating awareness (promotive).
This is the strengthening of community awareness and co-operation to promote
health within the family unit. Appropriate information is disseminated to as many
people in the community as possible. Current traditional health education
methods carried out in clinics and health centres are not appropriate, hence
5. the impact of such methods are negligible. People from within the community
are very effective in creating awareness.The information given to pass on
includes: The burden blindness brings to individuals who are themselves blind,
and on the family at home and on the community as a whole.The major
blinding diseases which are common in the area and how blindness can be
avoided. Understanding of basic first aid skills in case of accidents and
treatment of the common eye diseases. Offering guidance to the community
on how to arrange transportation and reach the health centre where more help
can be given.
Prevention:
This includes stimulation of individuals and their community to participate in
activities in blindness prevention; social and community development that
promotes health through changes in behaviour and environment and leads to
the reduction or elimination of factors contributing to ocular disease. Examples
of activities are as follows: Provision of adequate, safe water supplies; personal
hygiene.Construction, use and maintenance of pit latrines and refuse pits;
environmental hygiene. Growing and consumption of foods rich in vitamin A;
nutrition. Recognition and appropriate care of individuals at risk of blinding
diseases; for example, adequate feeding and rehydration of children with
severe measles, malnutrition or diarrhoea. Protection of eyes against injuries.
Immunisation against measles. Screening of antenatal mothers for sexually
transmitted diseases.
Curative activities:
This involves delivery of eye care to all individuals with potentially blinding
disorders in the communities. For example:correction of refractive errors with
provision of glasses and contact lenses First aid treatment and/or timely referral
of patients with injuries.Identification and treatment/referral of common eye
diseases.Identification and referral of patients with potentially blinding diseases
for appropriate management. Identification , arrangements of eye camps and
referral of curable blinding diseases like cataracts.
Rehabilitation activities:
What happens to those who are incurably blind? Do we merely sympathise with
them and their families? Since primary eye care is mainly concerned with the
community level, the issue of rehabilitation becomes very important. Clients are
assured that they are not completely useless. With training, skills can be
acquired and they can be functional and not have to rely totally on others.
6. OPHTHALMIC OFFICER
Primary eye care profession
Ophthalmic officer is the full time Primary Eye Care Professional
dedicated to care for the most treasured of human senses – Vision. It is
a dynamic health care professional that provides a wide range of
interesting, rewarding and challenging career opportunities and services
to the community. The profession provides an intellectually stimulating
career with a humanitarian role in today's society. Ophthalmic officers
are primary eye care providers who specialize in the examination and
diagnosis of the eye and the visual system and management of diseases
and disorders of the visual system, as well as the diagnosis of related
systemic conditions and also have vital role in various diagnostic
procedures in hospital as will as community settings.refraction, vision
therapy, contact lenses, low vision aids, visual rehabilitation counseling, detection
of pathology and referral, and emergency ocular treatment are the main
professional tasks.
Through academic and clinical training in medical colleges, ophthalmic
officer acquire knowledge and skills needed to diagnose, treat and
prevent problems of the visual system. Providing health education,
managing preventive regimen, supplying vision care to special groups of
patients are all part of an ophthalmic officers work.
He/She recognize ocular and visual signs of disease understand the
wide range of health problems affecting patients and refer patients to
appropriate specialists. Public health activities include vision screening
for communities, schools and rural part of Maharashtra.
----------------------------------------------------------------------------------------------------
7. VISION of PROFESSION
PROMOTE:
Promote healthy living and Healthy Sight , and healthy societies, especially for
the poor and those living in disadvantaged populations.
PREVENT :
Prevent blindness and avoid unnecessary disability due to chronic diseases. The
solutions exist now, and many are simple, cheap and cost effective.
TREAT :
Treat refractive error and vision disorders ,using latest available knowledge.
Make treatment available to all, especially those in the poorest settings.
CARE:
Help provide appropriate care by facilitating equitable and good quality eye
and health care for major chronic diseases.
The Mission of ProfessionThe Mission of ProfessionThe Mission of ProfessionThe Mission of Profession
“Our mission is to eliminate Avoidable blindness and visual
impairment through primary eye care Approach to fulfill the vision
and eye care needs of the public through clinical care , research
and education , all of which enhance the quality of life.”
8. JOB CHART OF OPHTHALMIC OFFICER
Original Duty Chart (“National Programme for Prevention of Visual Impairment
and Control of Blindness India” brought out in 1978)
Train staff at peripheral level in eye-care
Treat the patients for eye ailments
Test vision and prescribe glasses
Assist Mobile Units in conducting eye-care camps
Survey the community for early detection of eye defects
Organise community education.
The revisied duties under the National Programme for Control of Blindness (NPCB)
( 2nd meetings of the Committee of Experts held On 8th November, 2010)
ROLE AND RESPONSIBILITY AT PRIMARY LEVEL
1. Screening and identification of eye diseases at Primary level:
a) Cataract
b) Uncorrected refractive errors
c) Glaucoma
d) Childhood blindness
e) Diabetic retinopathy
f) Squint
g) Trachoma
h) Corneal opacity
i) Uveitis
j) Screening for colour vision (not for issuing certificate)
2. Treatment/ Medical intervention at Primary level (PHC) of the following common
eye diseases
a) Trachoma
b) Conjunctivitis
c) Allergies of eye lids and conjunctiva
d) Dry eye
e) Eyelid problems (blepharitis, stye, chalazion)
f) Vitamin A Deficiency
g) Lacrimal system Disorder,
h) Superficial corneal abraison
9. 3. Usage of following medications
a) Mydratics
b) Cycloplegics drugs for refraction
c) Topical anaesthetics for diagnostics
d) Basic antibiotics, pain killers, antihistaminics, antialergics
4. Refraction & prescription of spectacles,
5. Dispensing of spectacles
6. Identify, initiate primary medical treatment (as per the protocol) and refer to an
Ophthalmologist immediately in the following emergency cases:
a) Chemical burns
b) Perforating injuries of eyeball or lids
c) Corneal infections
d) Gluocoma
7. Minor surgical procedures
a) Epilation for Trichiasis
b) Superficial foreign body removal
8. Enucleation of the eye in cornea donation after proper training
9. Follow up of post operative cases
10. Referral
11. Health education and training at Primary level:
For all Primary level functionaries and Volunteers
12. Organization and management at Primary level
a) Documentation
b) Counseling
c) Screening camps
d) School eye health
e) Health education sessions
f) Coordination with other departments (ICDS, social justice, primary health)
g) Tele-ophthalmology
h) Epidemics
10. Role & Responsibility at Secondary Level
In the out patient department
1. Record complaints, history, preliminary anterior segment eye examination
2. Assessment of vision
3. Refraction : Manual & automated
a. Dilatation for refraction
b. Prescription of glasses
4. Tonometry(shiotz, applanation, non-contact tonometry)
5. Evaluation of lacrimal duct patency
6. Visual fields testing
7. Diplopia and hess charting
8. Binocular vision testing
9. Contact lens fitting, Low vision aids trial after getting appropriate training
10. Non invasive investigating techniques after training from a recognised institute
11. Prosthetic eye implant fitting
12. Coordination with primary level
13. Pre-operative work up
1. Slit lamp examination
2. Biometry: A Scan, Keratometry
3. Blood pressure
4. Checking blood sugar
Operation Theatre & Wards
14. Independently
1. Administration of pre and post operative medications and counselling
2. Sterilization of instruments, equipments
3. Setting up of surgical trolley and other equipments
15. Under Supervision
1. Administration of local anaesthesia under supervision of ophthalmic surgeon
2. Intramuscular and intradermal injections
3. Assist in surgery: draping of the patient, handing over instruments and handling
surgical supplies
--------------------------------------------------------------------------------------------------------------------------
11. The Oath
With full deliberation I freely and solemnly pledge that:
I will practice the art and science of primary eye care faithfully and
conscientiously, and to the fullest scope of my competence.
I will uphold and honorably promote by example and action the highest
Standards, ethics and ideals of my chosen profession and the honor
of the qualification, diploma in ophthalmic science, Globally known as Optometry
and vision science , which has been granted me.
I will provide professional care for those who seek my services, with
Concern, with compassion and with due regard for their human rights and
dignity.
I will place the treatment of those who seek my care above personal
gain and strive to see that none shall lack for proper care.
I will hold as privileged and inviolable all information entrusted to me
in confidence by my patients.
I will advise my patients fully and honestly of all which may serve to
Restore, maintain or enhance their vision and general health.
I will strive continuously to broaden my knowledge and skills so that
My patients may benefit from all new and efficacious means to
Enhance the care of human vision.
I will share information cordially and unselfishly with my fellow
Ophthalmic officers/ optometrists and other professionals for the benefit of
patients and the
Advancement of human knowledge and welfare.
I will do my utmost to serve my community, my country and
humankind as a citizen as well as an ophthalmic officer .
I hereby commit myself to be steadfast in the performance of this my
Solemn oath and obligation.
______________________________________________________
GOVT. OPHTHALMIC OFFICERS ASSOCIATION MAHARASHTRA . @ 2014