THE MOST SIMPLE BUT COMPACT WAYS OF HANDLING A 3-YEAR-OLD PATIENT. YOU SHOULD NOT MISS THIS!
CLINICAL CASE PRESENTATION FOR A 3-YEAR-OLD PATIENT WITH THE COMPLAINT OF DIFFICULTY TO RECOGNISE FAR OBJECTS.
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Contact lens fitting in keratoconus copykamal thakur
This document discusses keratoconus and contact lens fitting options for keratoconus patients. It begins by describing the different types and stages of keratoconus cones. It then discusses the various contact lens options including soft lenses, rigid gas permeable lenses, and scleral lenses. For rigid gas permeable lenses, it explains the different fitting philosophies of apical bearing, apical clearance, and three point touch. Specific lens designs like Rose K2 and scleral lenses are also summarized. Key factors for determining the appropriate contact lens are also listed.
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.
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.
Fitting Philosophies and Assessment of Spherical RGP lenses Urusha Maharjan
This document discusses the fitting of spherical rigid gas permeable (RGP) contact lenses. It covers preliminary measures like determining corneal curvature and diameter. Forces affecting lens fit like gravity and tear flow are described. Selection of the first trial lens involves choosing the appropriate back optic zone radius, diameter, and power based on factors like corneal curvature and prescription. Dynamic and static fitting criteria are provided. The lens is assessed for proper movement, centration, and vision. Neutralization of corneal astigmatism by about 90% with a spherical RGP lens is explained through an example.
This document presents a case study of a 21-year-old female student complaining of tearing and eyestrain with prolonged near work. Her ocular examination results are within normal limits except for a low accommodative facility and binocular vision dysfunction. The patient is diagnosed with fusional vergence dysfunction based on her symptoms and examination findings. She is prescribed daily jump exercises for one month to treat her condition.
Fitting soft contact lenses requires considering many patient-specific factors to achieve excellent vision and ocular health. A proper fit involves selecting the correct total diameter, base curve, thickness, and material based on the patient's prescription, corneal shape, lifestyle, and health. Trial lenses are used to evaluate fit parameters like coverage, centration, movement, comfort, and vision to optimize on-eye performance while avoiding issues like tightness or looseness that could impact ocular health or vision. The goal is to find a lens that provides optimum vision and good comfort without causing any ocular insult.
A 50-year-old housewife presented with decreased distance and near vision for 15 years. She was diagnosed with retinitis pigmentosa. While she could do her daily activities independently, she wanted to enhance her vision. Her visual acuity improved to 0.9 LogMAR with glasses, and a monocular telescope improved her distance vision to 0.3. She was prescribed glasses, convex lenses, and counseling and asked to follow up in 3-4 months.
This case report discusses the management of keratoconus in a 24-year-old male. He was referred for contact lens fitting for keratoconus diagnosed 5 years prior in his right eye, which had previously undergone C3R procedure. Topography showed inferior thinning in the right eye. Rose K2 and soft toric lens trials produced good centration and vision. The lenses were ordered and the patient was asked to return for collection. The conclusion discusses recent advances in keratoconus treatment including collagen cross-linking, excimer laser, phakic IOLs, and intrastromal corneal ring segments.
Contact lens fitting in keratoconus copykamal thakur
This document discusses keratoconus and contact lens fitting options for keratoconus patients. It begins by describing the different types and stages of keratoconus cones. It then discusses the various contact lens options including soft lenses, rigid gas permeable lenses, and scleral lenses. For rigid gas permeable lenses, it explains the different fitting philosophies of apical bearing, apical clearance, and three point touch. Specific lens designs like Rose K2 and scleral lenses are also summarized. Key factors for determining the appropriate contact lens are also listed.
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.
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.
Fitting Philosophies and Assessment of Spherical RGP lenses Urusha Maharjan
This document discusses the fitting of spherical rigid gas permeable (RGP) contact lenses. It covers preliminary measures like determining corneal curvature and diameter. Forces affecting lens fit like gravity and tear flow are described. Selection of the first trial lens involves choosing the appropriate back optic zone radius, diameter, and power based on factors like corneal curvature and prescription. Dynamic and static fitting criteria are provided. The lens is assessed for proper movement, centration, and vision. Neutralization of corneal astigmatism by about 90% with a spherical RGP lens is explained through an example.
This document presents a case study of a 21-year-old female student complaining of tearing and eyestrain with prolonged near work. Her ocular examination results are within normal limits except for a low accommodative facility and binocular vision dysfunction. The patient is diagnosed with fusional vergence dysfunction based on her symptoms and examination findings. She is prescribed daily jump exercises for one month to treat her condition.
Fitting soft contact lenses requires considering many patient-specific factors to achieve excellent vision and ocular health. A proper fit involves selecting the correct total diameter, base curve, thickness, and material based on the patient's prescription, corneal shape, lifestyle, and health. Trial lenses are used to evaluate fit parameters like coverage, centration, movement, comfort, and vision to optimize on-eye performance while avoiding issues like tightness or looseness that could impact ocular health or vision. The goal is to find a lens that provides optimum vision and good comfort without causing any ocular insult.
A 50-year-old housewife presented with decreased distance and near vision for 15 years. She was diagnosed with retinitis pigmentosa. While she could do her daily activities independently, she wanted to enhance her vision. Her visual acuity improved to 0.9 LogMAR with glasses, and a monocular telescope improved her distance vision to 0.3. She was prescribed glasses, convex lenses, and counseling and asked to follow up in 3-4 months.
This case report discusses the management of keratoconus in a 24-year-old male. He was referred for contact lens fitting for keratoconus diagnosed 5 years prior in his right eye, which had previously undergone C3R procedure. Topography showed inferior thinning in the right eye. Rose K2 and soft toric lens trials produced good centration and vision. The lenses were ordered and the patient was asked to return for collection. The conclusion discusses recent advances in keratoconus treatment including collagen cross-linking, excimer laser, phakic IOLs, and intrastromal corneal ring segments.
This document contains information about conducting a low vision assessment, including sections on collecting demographic data, chief complaints, medical and ocular history, visual functioning, goals, and potential low vision devices. It also includes 4 case studies: an 89-year-old with macular degeneration who needs help reading small print, a graduate student who needs magnification for lab work, an aphakic patient with distance and near vision difficulties, and a teacher with retinitis pigmentosa. The case studies demonstrate evaluating patients' needs, calculating required optical powers, testing devices, and selecting appropriate low vision aids.
This document discusses the fitting of toric contact lenses. It begins with an introduction and discusses preliminary testing, fitting steps, and different toric lens designs. Stabilization techniques for toric lenses like prism ballast, truncation, and reverse prism are explained. The conclusion emphasizes measuring axis mislocation and compensating for lens rotation when determining the final prescription.
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 provides guidelines for prescribing glasses in children. It discusses that the pediatric eye is different from the adult eye in terms of axial length, corneal curvature, and lens power. The goals of prescribing glasses in children are to provide a focused retinal image and achieve optimal balance between accommodation and convergence. It is more difficult to prescribe glasses for children due to lack of subjective response and poor attention. American guidelines provide recommendations on refractive errors that warrant correction at different ages. Factors like emmetropization, amblyopia risk, and presence of strabismus are considered. Frame selection depends on the child's condition and age, aiming for correct fit, comfort, safety, and not hindering nasal development.
This document contains information about various tests used to evaluate monocular fixation, including past pointing, visuoscopy, Haidinger's brush, and fixation disparity tests. It provides details on how each test is performed and what it evaluates. For example, it explains that past pointing detects abnormal visual localization in patients with recent eye muscle paralysis by having them point to where an object is located. Visuoscopy uses a modified ophthalmoscope to project a target on the retina to assess fixation point. Haidinger's brush and Maxwell's spot can also be used to determine the direction and magnitude of any eccentric fixation.
This document discusses eccentric fixation (EF), a condition where an eye fails to fixate with the fovea and instead fixates at another retinal point. It describes several theories for the cause of EF, including suppression, anomalous correspondence, motor, and sensory motor theories. It outlines methods for investigating EF, such as ophthalmoscopy and visuscopy. Treatment options discussed include occlusion therapy and pleoptic treatment to encourage foveal fixation, though EF is often difficult to fully correct once established. The document also discusses microtropia, a small-angle strabismus associated with EF and amblyopia.
Types of pediatric contact lens [autosaved]Bipin Koirala
This document discusses pediatric contact lens fitting and evaluation. It begins by outlining the advantages of contact lenses over glasses for children, including a wider field of view. Key considerations for fitting include small eye size, tear production, and compliance. Conditions that may require lenses include refractive errors, amblyopia treatment, and aphakia following cataract surgery. Evaluations include testing visual acuity and ocular health. Lens options discussed are silicone, hydrogel, and rigid gas permeable lenses. Special fitting considerations for aphakic children include initially high powers of +20D to +35D, depending on age.
The document summarizes the Amsler grid, a diagnostic tool used since 1945 to screen for and monitor macular diseases. It consists of a grid with a central dot that patients look at to detect any distortions, gaps, or blurred areas in their central vision. Various versions are available, including ones with different colors, patterns of lines, or dot sizes to test specific parts of the visual field and detect different types of visual abnormalities that could indicate conditions like macular degeneration or glaucoma. The procedure involves having patients view the grid with each eye separately at 16 inches and report any anomalies in the lines of the grid.
The document discusses different techniques for visual field testing in pediatrics, including confrontation arc perimetry, hemispheric perimetry, and Goldmann perimetry. It provides examples of visual field defects seen in different pediatric patients, such as right or left hemifield defects, and inferior field defects. The document also outlines consequences of visual field defects, compensation strategies, and recommendations for children with major visual field defects.
The optom faslu muhammed is a haploscopic device used to assess binocular vision. It consists of two tubes mounted on a base with a chin rest and forehead rest. Each tube contains a light source, slide carrier, reflecting mirror, and +6.50D eye piece. It is used to test various grades of binocular vision like simultaneous macular perception, fusion, and stereopsis using different slides. It can also be used to measure the inter-pupillary distance, angle of deviation, and range of fusion.
This document discusses soft toric contact lenses for correcting astigmatism. It defines astigmatism and describes various types. It explains that toric lenses contain a cylindrical component to correct astigmatism unlike standard soft lenses. The document outlines several designs and methods for stabilizing toric soft contact lenses, including prism ballast, dynamic stabilization, and reverse prism designs. It provides steps for fitting toric lenses including diagnosis, trial lenses, and assessing lens rotation to finalize the axis. Examples of toric lens prescriptions and assessments of fit are also summarized.
The document summarizes a case study of a 20-year-old male patient with left eye vision loss since childhood due to corneal scarring who was fitted for a prosthetic soft contact lens. Details are provided on the patient's history and examination, differential diagnosis, types and fitting criteria of prosthetic contact lenses, fitting of a medium brown type D prosthetic lens, and fitting assessment showing good coverage, centration, and movement. The plan is for the patient to be fitted with a single purecon prosthetic soft contact lens.
This document discusses the verification process for contact lenses. It has two main stages - laboratory and clinical. In the laboratory, lenses are checked to ensure their parameters match what was ordered. Clinically, lenses should be verified upon receipt to ensure the correct lens was dispensed. Parameters like radius of curvature, diameters, thickness and power must be measured for both rigid and soft contact lenses using various techniques and instruments. On-eye verification is also important to assess fit and comfort. The goal of verification is to ensure patients receive high quality lenses that meet specifications and provide good vision.
Bifocals are lenses with two optical powers, one for distance and one for near. There are several types of bifocal segments including round, flat top, curve top, ribbon, and Franklin style. Bifocals can be made through fused, one piece, or cemented constructions. When measuring for bifocals, the frame is positioned as it will be worn and the bifocal height is measured from the lower limbus or lid margin using a vertical ruler. This ensures the bifocal segment will be at the proper height for the wearer.
1) Biometry is the process of measuring the eye to determine the ideal intraocular lens power for cataract surgery. It involves measuring the corneal power and axial length of the eye.
2) Traditional A-scan ultrasound biometry measures axial length using sound waves, but has limitations like variable corneal compression. Newer devices like the IOL Master use optical interferometry and are non-contact.
3) Proper technique and accounting for factors like intraocular lens material are important for accurate biometry and intraocular lens power calculation. Inaccuracies can result in postoperative refractive surprises.
This document discusses contact lens fitting following various refractive surgeries. It begins with an introduction to refractive surgeries like radial keratotomy, PRK, LASIK, LASEK, SMILE, and others. It then discusses considerations and techniques for fitting contact lenses after different surgeries, focusing on fitting rigid gas permeable lenses, mini-scleral lenses, and hybrid lenses following procedures like radial keratotomy that can result in irregular astigmatism. The document provides guidance on lens parameters and fitting criteria to achieve a stable, comfortable fit while maintaining corneal health after refractive surgery.
- The patient is a 6 year old male who was diagnosed with moderately turning of the face towards the left side, left eye esotropia, low amplitude horizontal pendular nystagmus, and moderate refractive error. He has been wearing glasses for 5 years.
- On examination, he was found to have nasally eccentric pupil, involuntary eye movements (nystagmus), and full range of eye movement. His retina and macula were normal but his optic disc was hyperemic.
- He was advised glasses, occlusion therapy, and review after 8 months. His nystagmus is likely congenital given his history of wearing glasses since age 5 and diagnosis of refractive error and strabismus
This document discusses methods for assessing visual acuity in pediatric patients. It begins by defining visual acuity and describing its normal development from birth through age 6. It then outlines different techniques for measuring various types of visual acuity, including detection, resolution, and recognition acuity. These techniques include methods that elicit voluntary responses like candy beads, as well as involuntary responses like optokinetic nystagmus drums and visual evoked potentials. Preferential looking tests using cards with different grating frequencies are described as a way to measure resolution acuity in nonverbal children.
Soft toric contact lenses are used to correct astigmatism by having different powers in different meridians. They come in various types depending on the surface curvature (front toric, back toric, bitoric), material (hydrogel, silicone hydrogel), wearing schedule (disposable, extended wear), and color. Silicone hydrogel lenses allow for higher oxygen permeability. Toric lenses are suitable for astigmatism patients wanting colored lenses. Disposable lenses are worn daily to monthly while extended wear lenses can be worn continuously for up to 30 days. Soft toric lenses are indicated for astigmatism over 0.75D when spherical lenses are insufficient or rigid lenses not tolerated.
This document describes the Worth four-dot test procedure used to differentiate between binocular single vision (BSV), alternating or harmonious anomalous retinal correspondence (ARC), and various types of suppression. The test involves having the patient view four lights - one red, two green, and one white - through differently colored lenses placed in front of each eye. The number and color of lights seen by the patient can indicate whether they have BSV, ARC, or left, right, alternating, or diplopia suppression. The results must be interpreted in the context of any manifest strabismus present at the time of testing.
This document contains information about conducting a low vision assessment, including sections on collecting demographic data, chief complaints, medical and ocular history, visual functioning, goals, and potential low vision devices. It also includes 4 case studies: an 89-year-old with macular degeneration who needs help reading small print, a graduate student who needs magnification for lab work, an aphakic patient with distance and near vision difficulties, and a teacher with retinitis pigmentosa. The case studies demonstrate evaluating patients' needs, calculating required optical powers, testing devices, and selecting appropriate low vision aids.
This document discusses the fitting of toric contact lenses. It begins with an introduction and discusses preliminary testing, fitting steps, and different toric lens designs. Stabilization techniques for toric lenses like prism ballast, truncation, and reverse prism are explained. The conclusion emphasizes measuring axis mislocation and compensating for lens rotation when determining the final prescription.
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 provides guidelines for prescribing glasses in children. It discusses that the pediatric eye is different from the adult eye in terms of axial length, corneal curvature, and lens power. The goals of prescribing glasses in children are to provide a focused retinal image and achieve optimal balance between accommodation and convergence. It is more difficult to prescribe glasses for children due to lack of subjective response and poor attention. American guidelines provide recommendations on refractive errors that warrant correction at different ages. Factors like emmetropization, amblyopia risk, and presence of strabismus are considered. Frame selection depends on the child's condition and age, aiming for correct fit, comfort, safety, and not hindering nasal development.
This document contains information about various tests used to evaluate monocular fixation, including past pointing, visuoscopy, Haidinger's brush, and fixation disparity tests. It provides details on how each test is performed and what it evaluates. For example, it explains that past pointing detects abnormal visual localization in patients with recent eye muscle paralysis by having them point to where an object is located. Visuoscopy uses a modified ophthalmoscope to project a target on the retina to assess fixation point. Haidinger's brush and Maxwell's spot can also be used to determine the direction and magnitude of any eccentric fixation.
This document discusses eccentric fixation (EF), a condition where an eye fails to fixate with the fovea and instead fixates at another retinal point. It describes several theories for the cause of EF, including suppression, anomalous correspondence, motor, and sensory motor theories. It outlines methods for investigating EF, such as ophthalmoscopy and visuscopy. Treatment options discussed include occlusion therapy and pleoptic treatment to encourage foveal fixation, though EF is often difficult to fully correct once established. The document also discusses microtropia, a small-angle strabismus associated with EF and amblyopia.
Types of pediatric contact lens [autosaved]Bipin Koirala
This document discusses pediatric contact lens fitting and evaluation. It begins by outlining the advantages of contact lenses over glasses for children, including a wider field of view. Key considerations for fitting include small eye size, tear production, and compliance. Conditions that may require lenses include refractive errors, amblyopia treatment, and aphakia following cataract surgery. Evaluations include testing visual acuity and ocular health. Lens options discussed are silicone, hydrogel, and rigid gas permeable lenses. Special fitting considerations for aphakic children include initially high powers of +20D to +35D, depending on age.
The document summarizes the Amsler grid, a diagnostic tool used since 1945 to screen for and monitor macular diseases. It consists of a grid with a central dot that patients look at to detect any distortions, gaps, or blurred areas in their central vision. Various versions are available, including ones with different colors, patterns of lines, or dot sizes to test specific parts of the visual field and detect different types of visual abnormalities that could indicate conditions like macular degeneration or glaucoma. The procedure involves having patients view the grid with each eye separately at 16 inches and report any anomalies in the lines of the grid.
The document discusses different techniques for visual field testing in pediatrics, including confrontation arc perimetry, hemispheric perimetry, and Goldmann perimetry. It provides examples of visual field defects seen in different pediatric patients, such as right or left hemifield defects, and inferior field defects. The document also outlines consequences of visual field defects, compensation strategies, and recommendations for children with major visual field defects.
The optom faslu muhammed is a haploscopic device used to assess binocular vision. It consists of two tubes mounted on a base with a chin rest and forehead rest. Each tube contains a light source, slide carrier, reflecting mirror, and +6.50D eye piece. It is used to test various grades of binocular vision like simultaneous macular perception, fusion, and stereopsis using different slides. It can also be used to measure the inter-pupillary distance, angle of deviation, and range of fusion.
This document discusses soft toric contact lenses for correcting astigmatism. It defines astigmatism and describes various types. It explains that toric lenses contain a cylindrical component to correct astigmatism unlike standard soft lenses. The document outlines several designs and methods for stabilizing toric soft contact lenses, including prism ballast, dynamic stabilization, and reverse prism designs. It provides steps for fitting toric lenses including diagnosis, trial lenses, and assessing lens rotation to finalize the axis. Examples of toric lens prescriptions and assessments of fit are also summarized.
The document summarizes a case study of a 20-year-old male patient with left eye vision loss since childhood due to corneal scarring who was fitted for a prosthetic soft contact lens. Details are provided on the patient's history and examination, differential diagnosis, types and fitting criteria of prosthetic contact lenses, fitting of a medium brown type D prosthetic lens, and fitting assessment showing good coverage, centration, and movement. The plan is for the patient to be fitted with a single purecon prosthetic soft contact lens.
This document discusses the verification process for contact lenses. It has two main stages - laboratory and clinical. In the laboratory, lenses are checked to ensure their parameters match what was ordered. Clinically, lenses should be verified upon receipt to ensure the correct lens was dispensed. Parameters like radius of curvature, diameters, thickness and power must be measured for both rigid and soft contact lenses using various techniques and instruments. On-eye verification is also important to assess fit and comfort. The goal of verification is to ensure patients receive high quality lenses that meet specifications and provide good vision.
Bifocals are lenses with two optical powers, one for distance and one for near. There are several types of bifocal segments including round, flat top, curve top, ribbon, and Franklin style. Bifocals can be made through fused, one piece, or cemented constructions. When measuring for bifocals, the frame is positioned as it will be worn and the bifocal height is measured from the lower limbus or lid margin using a vertical ruler. This ensures the bifocal segment will be at the proper height for the wearer.
1) Biometry is the process of measuring the eye to determine the ideal intraocular lens power for cataract surgery. It involves measuring the corneal power and axial length of the eye.
2) Traditional A-scan ultrasound biometry measures axial length using sound waves, but has limitations like variable corneal compression. Newer devices like the IOL Master use optical interferometry and are non-contact.
3) Proper technique and accounting for factors like intraocular lens material are important for accurate biometry and intraocular lens power calculation. Inaccuracies can result in postoperative refractive surprises.
This document discusses contact lens fitting following various refractive surgeries. It begins with an introduction to refractive surgeries like radial keratotomy, PRK, LASIK, LASEK, SMILE, and others. It then discusses considerations and techniques for fitting contact lenses after different surgeries, focusing on fitting rigid gas permeable lenses, mini-scleral lenses, and hybrid lenses following procedures like radial keratotomy that can result in irregular astigmatism. The document provides guidance on lens parameters and fitting criteria to achieve a stable, comfortable fit while maintaining corneal health after refractive surgery.
- The patient is a 6 year old male who was diagnosed with moderately turning of the face towards the left side, left eye esotropia, low amplitude horizontal pendular nystagmus, and moderate refractive error. He has been wearing glasses for 5 years.
- On examination, he was found to have nasally eccentric pupil, involuntary eye movements (nystagmus), and full range of eye movement. His retina and macula were normal but his optic disc was hyperemic.
- He was advised glasses, occlusion therapy, and review after 8 months. His nystagmus is likely congenital given his history of wearing glasses since age 5 and diagnosis of refractive error and strabismus
This document discusses methods for assessing visual acuity in pediatric patients. It begins by defining visual acuity and describing its normal development from birth through age 6. It then outlines different techniques for measuring various types of visual acuity, including detection, resolution, and recognition acuity. These techniques include methods that elicit voluntary responses like candy beads, as well as involuntary responses like optokinetic nystagmus drums and visual evoked potentials. Preferential looking tests using cards with different grating frequencies are described as a way to measure resolution acuity in nonverbal children.
Soft toric contact lenses are used to correct astigmatism by having different powers in different meridians. They come in various types depending on the surface curvature (front toric, back toric, bitoric), material (hydrogel, silicone hydrogel), wearing schedule (disposable, extended wear), and color. Silicone hydrogel lenses allow for higher oxygen permeability. Toric lenses are suitable for astigmatism patients wanting colored lenses. Disposable lenses are worn daily to monthly while extended wear lenses can be worn continuously for up to 30 days. Soft toric lenses are indicated for astigmatism over 0.75D when spherical lenses are insufficient or rigid lenses not tolerated.
This document describes the Worth four-dot test procedure used to differentiate between binocular single vision (BSV), alternating or harmonious anomalous retinal correspondence (ARC), and various types of suppression. The test involves having the patient view four lights - one red, two green, and one white - through differently colored lenses placed in front of each eye. The number and color of lights seen by the patient can indicate whether they have BSV, ARC, or left, right, alternating, or diplopia suppression. The results must be interpreted in the context of any manifest strabismus present at the time of testing.
This document discusses the importance of early vision screening and detection in infants. It provides recommended screening schedules based on age, describes typical visual development milestones in infants, and outlines common pediatric vision conditions and disorders. Screening tests are described to assess visual acuity, eye alignment and movement, color vision and other visual functions in infants. Treatment guidelines for common refractive errors like myopia and hyperopia are also mentioned. The overall message is that early detection through screening can help reduce vision loss in children.
Congenital glaucoma is caused by developmental abnormalities that obstruct the drainage of fluid from the eye, leading to elevated pressure. It is classified by age of onset and any associated anomalies. Examination involves assessing vision, pressure, anatomy, and optic nerve changes. Treatment begins with surgery to improve drainage, along with glasses and vision therapy. For severe vision loss, low vision aids like telescopes or magnifiers can help patients function better.
This document summarizes the key steps in examining a case of squint. It outlines obtaining the patient's presenting signs and symptoms, medical history, and previous treatments. Tests are described to assess visual acuity, fixation, refractive error, and the anterior segment. The motor status is examined through head posture, ocular movements, and fusional vergences. Ocular deviation is detected using cover tests and quantified. The sensory status is evaluated for binocularity, diplopia, retinal correspondence, suppression, amblyopia, and stereopsis. Both objective and subjective examination methods are outlined to thoroughly evaluate squint.
The document discusses guidelines for discharging neonates from the hospital. It outlines several criteria that should be met before discharge, including the infant being physiologically stable and able to feed adequately. Important screening tests that must be completed prior to discharge include pulse oximetry for congenital heart disease, examination for developmental dysplasia of the hip, and checking the red reflex. The guidelines aim to ensure neonates are ready based on developmental factors rather than just weight before being discharged from the hospital.
This document provides information on pediatric visual acuity assessment. It discusses various methods used to assess visual acuity in infants, toddlers, preschoolers, and school-aged children. These include optokinetic nystagmus testing, preferential looking tests, Cardiff acuity card testing, visually evoked potentials, and indirect assessment methods. The document outlines the procedures, advantages, and limitations of each method. It also reviews normal visual milestones in infants and children and expected visual acuity levels based on age. Accurate assessment of pediatric visual acuity is important for early detection of eye problems and vision development.
Real pediatric visual acuity assessmentBipin Koirala
This document discusses various methods for assessing visual acuity in pediatric patients from infants to school-aged children. It begins by outlining visual milestones in infant development and different techniques used for infants, including optokinetic nystagmus testing, preferential looking tests, Cardiff acuity testing, and visually evoked potentials. Methods for toddlers are then reviewed, such as dot visual acuity tests, coin tests, miniature toy tests, Sheridan's ball test, and Boek's candy test. The document concludes by emphasizing the importance of early visual acuity assessment and addressing challenges in pediatric assessment.
The document provides guidelines for prescribing spectacles for pediatric patients, outlining the normal ranges of refractive error at different ages and recommendations for when to prescribe based on the type and amount of refractive error. It discusses factors like emmetropization and amblyopia risk that are important to consider for pediatric patients. The guidelines aim to help clinicians properly manage refractive errors in children to support optimal visual development.
This document summarizes a study that evaluated the effectiveness of the Teller Acuity Cards (TAC) in detecting amblyopia in children. The study assessed grating acuity (using TAC) and optotype acuity in 45 children with unilateral amblyopia, 44 children at risk for amblyopia, and 37 children with normal vision. Grating acuity was finer than optotype acuity for amblyopic eyes but not fellow eyes. The discrepancy was larger for more severe amblyopia. Nevertheless, grating acuity detected amblyopia with 80% sensitivity, suggesting it is effective for detecting amblyopia in children.
Vision screening is important to identify vision impairments in children so they can receive treatment. Screening should begin at birth and continue at well-child visits. Early screening can detect conditions like amblyopia, which is most effectively treated in early childhood. While only 21% of preschoolers receive vision screening, screening is highly cost-effective for detecting and treating amblyopia and other vision issues. Pediatricians play a key role in regularly screening children's vision as part of comprehensive well-child care.
Soal ujian sooca blok indera khusus 2021Imam Rakhman
A 65-year-old man presented with complaints of hearing loss in both ears for 3 months along with tinnitus. Physical examination found normal vital signs and otoscopy revealed clear ear canals. Pure tone audiometry led to a diagnosis of presbycusis. Students were assigned tasks related to understanding and presenting information about presbycusis, including creating a mind map, explaining etiology, symptoms, pathophysiology, management, prognosis, classification, and differential diagnosis. They were also asked to present this case.
This document provides guidance for pediatric vision screening and eye exams. It discusses evaluating visual acuity in young children using picture tests. Photoscreening can identify conditions like strabismus or refractive errors. Tests for ocular motility include the corneal light reflex test to check eye alignment, and the cover test to detect strabismus. Any signs of vision or eye problems should warrant a referral to an ophthalmologist for a comprehensive eye exam.
Basics of pediatric refraction by dr.adnanMahamudAdnan
This document summarizes the basics of pediatric refraction as presented by Dr. Mahamud Adnan. Key points include:
1) Pediatric refraction requires great expertise as it is different from normal refraction due to active accommodation in children. Cycloplegic refraction is preferable to paralyze the ciliary muscles.
2) The refractive status of infants and children changes rapidly in the first year as visual development occurs. Cycloplegia allows determining the true refractive error without accommodation.
3) Cycloplegic drugs like atropine and cyclopentolate are used which have side effects like blurred vision but allow full paralysis of accommodation for accurate refraction assessment. Timely intervention and
The Worth Four Dot Test is used to determine the presence of suppression or diplopia. It involves having the patient view four lights (one red, two green, one white) through red-green lenses. The number and configuration of lights seen indicates the type of strabismus or binocular vision status. It is an inexpensive and easy to administer test, but relies on subjective patient responses. Some studies have found it can provide reliable results even in patients with red-green color vision defects.
Cover test
Prism cover test
Worth 4 dot test
Bagolini striated glasses
Synoptophore
Stereopsis tests
The aim is to assess:
- Ocular alignment
- Fusional reserves
- Stereopsis
- Retinal correspondence
Cover Test
The cover test is used to detect manifest
strabismus and latent strabismus.
It is performed at distance and near to check
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1. Every child is a
DIFFERENT kind
of .
All together,
They make this world
a
.
CLINICAL CASE ANALYSIS
PRESENTATION:
CASE 27
ANNERA LEA BANUS
HS246 5A
OPT560
2. CASE HISTORY
A 3-year-old boy came for an eye examination with his mother.
The mother reported that he had difficulty recognising far
object, testing on him while they were on a road trip. The boy
also tend to squeeze his eyes when looking far. He watched
TV at a 1-meter distance. He had normal birth history
(Cesarean) at 37 week. He had good motor, fine and gross
development. He has no record of ocular disorders. His father
wears spectacle.
3. CASE HISTORY
A 3-year-old boy came for an eye examination with his mother.
The mother reported that he had difficulty recognising far
object testing on him while they were on a road trip. The boy
also tend to squeezes his eye when looking far. He watched
TV at a 1-meter distance. He had normal birth history
(Cesarean) at 37 week. He had good motor, fine and gross
development. He has no record of ocular disorders. His father
wears spectacle.
1ᵒ complaint
Associated symptom
Patient’s way for relief
4. CHIEF COMPLAINTS
1ᵒ : Object recognising difficulty at distance.
2ᵒ : Watched TV too close at 1 meter
1. Hyperopia
2. Myopia
3. Astigmatism
Uncorrected
Refractive error
1. Suspected AI
2. Suspected CI
BV Problems
1. Cataract
2. Juvenile
glaucoma
3. Traumatic
glaucoma
Pathological in fundus
1 2 3
DDX
5. ABNORMAL FINDINGS
0-1 years old
Venus has a very
beautiful name, but it’s
terribly hot
1-2 years old
Mercury is the closest
planet to the Sun and
the smallest one
Normal finding:
6/9-6/6 OU
Average rx (3yo): +1.00D)
Normal:
Break: 5cm +/- 2.5
Rec: 7cm +/-3.0
6. ABNORMAL FINDINGS
Normal: =/> 10mm
Normal IOP (Paediatric patient)
• Up to 10y.o IOP: 0.71 x age (years) + 10
Similar findings:
i. Shiota et al’s works for 0-12y.o patient: 12.02mmHg +/- 3.74mmHg
ii. Jafar and Kazi’s works for patient below 5y.o: mean= 5.89mmHg (Perkins)
Normal: Mean= 12.13mmHg
8. 1. Uncorrected hyperopic astigmatism
RE: +1.75/-1.00 x 5 (6/6)
LE: +1.50/-1.25 x 180 (6/6)
2. Suspected AI & suspected CI
3. Suspected glaucoma (juvenile or
traumatic)
Chief complaint
DIAGNOSES
Differential
diagnosis
Abnormal
findings
9. SHORT-TERM MANAGEMENTS
2.Patient education and consultation with the parent.
i. Visual hygiene
• 20-20-20 rule when doing near task such as playing with 4 pieces puzzle
• Watch TV at an appropriate distance (5-6 feet) and hold gadget at 16-18inches
• Limit screen time <2 hours (1hour/day) and must be co-viewed
• Video of choice must be interactive to promote child’s development, non-violent, educational and pro-
social.
ii. Inform parents regarding the child’s visual development and what they can do to
support it.
• Help the child to practice visual memory like playing with cards and improve pursuit with puzzles
• Strengthen eye tracking skills and hand-eye-coordination by allowing the child to play games like peg
board. Parent can show child how to move each pieces in right left pattern.
1.History taking: Further questions to the parents:
i. Any recent history of ocular trauma to the patient?
ii. Do any family member has glaucoma or any ocular condition?
10. LONG-TERM MANAGEMENT:
TCA 3 MONTHS
i. Monitor patient’s refractive status according to normal development
milestones of a 3 year old to check if prescription is needed
- VA (6/9 to 6/6 BE)
- Normal present refractive status: +1.00DS
3
2
1
Consideration of prescription: 2-4 year old
1. Hyperopia (+3.50DS)
2. Astigmatism (-2.00DC)
-Partial prescription (leaving +1.2D uncorrected)
-Frame criteria: full non-metal frame, spring hinges, low bridge,
frame support at ears, character of choice
-Lens criteria: Polycarbonate (high index:1.586), MUST have AR-coating
11. SHORT-TERM MANAGEMENT:
TCA 3 MONTHS
3
2
1
ii. Re-assess stereopsis test using Titmus stereo fly test or The Frisby Test to
determine the extent of the patient’s depth of perception for BV test
iii. Monitor IOP, perform SLB to check the anterior chamber angle and ophthalmoscopy
to confirm suspected glaucoma. If confirmed then referral to the Ophthalmologist
within 1 week will be done for treatment (medicine prescription).
iv. If spectacle is prescribed, patient education regarding compliance will be done. The
spectacle needs to be worn full time to support visual demand of the patient.
TCA 6 MONTHS:
i. Assess patient’s refractive status for any visual acuity improvement
(reaching to 6/6 BE).
ii. If spectacle was prescribed during first TCA, then patient’s oculo-visual
needs to be assessed to monitor adaptation to the prescription
12. SHORT-TERM MANAGEMENT:
3
2
1
TCA 1 YEAR
i. Yearly eye examination to monitor VA, RX, ocular health
ii. Assess BV development to reconfirm or rule out suspect of CI and AI
(stereopsis, pupillary response,CV) since BV is well developed at 4yo.
iii. If spectacle was prescribed the both ocular health and visual performance
will be re-assessed (Changes in power/VA/Stereoacuity)
At the age of 6, patient’s binocular vision will be assessed
using:
1. Accommodation development: MEM
2. Convergence: NPC with modification
3. Heterophoria: PCT
4. Suppression test: Worth 4 Dot
13. Thank you
If we experienced life
through the eyes of a
child, everything would be
magical and extraordinary.
-Arkiane Kramarik-