Ophthalmology and Optometry multiple Choice Questions.... Optometry Fans
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This document contains 20 multiple choice questions about topics in ophthalmology and optometry including retinoscopy, cycloplegic drugs, refractive errors like myopia and hypermetropia, intraocular lenses, simple microscope lenses, and types of lenses. Each question is followed by 4 possible answer choices. The document is a quiz from an optometry fans website intended to test knowledge in these subject areas.
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BINOCULAR VISION M.C.Q QUESTION
This document contains questions and answers related to vision and eye health. It addresses topics like:
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Binocular refraction techniques aim to evaluate a patient's refractive status under binocular viewing conditions. This allows for the detection of suppression, measurement of stereopsis and fixation disparity. Techniques include using a septum, polarization, or fogging to allow each eye to view separate targets while maintaining binocular fusion. Binocular balancing ensures the retinal images are simultaneously in focus for both eyes. The binocular best sphere finds the spherical prescription providing maximum binocular visual acuity. Binocular refraction at near is also important to evaluate a patient's refractive needs for near vision tasks.
Orthoptics Introduction test
An orthoptic evaluation systematically evaluates the function of eye muscles during binocular eye movements to maintain fusion. It identifies accommodative, vergence, or fusional vergence anomalies to guide orthoptic exercises for treatment. The evaluation includes tests to check for single vision, diplopia, suppression, alignment, and accommodation. Based on symptoms like headaches or blurry vision, further tests are done to diagnose conditions like convergence insufficiency. The evaluation involves tests of phoria, near point of convergence, accommodation, fusional vergence, and accommodative function and facility.
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The document discusses rigid gas permeable contact lenses, including their benefits, applications, fitting process, and lens design considerations. Some key points covered include:
1. RGP lenses can automatically correct astigmatism, provide good vision and eye health benefits like increased oxygen transmission.
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250+ High Frequency MCQs in Optometry and Ophthalmology
This document provides a collection of 250+ multiple choice questions (MCQs) in optometry and ophthalmology. It aims to help students study for entrance, licensing, and job exams in these fields. The questions cover a range of difficulty levels and come from past exams. Authentic answers are provided from experienced professionals. More similar questions and answers are available at the provided link. The questions are regularly updated to help eye health professionals prepare for various exams.
Frame repairs and tools
The document discusses various tools used for optical repairs, including different types of optical screwdrivers, flaring pliers, and screw-lift tools. It also describes the different types of nose pad assemblies, including screw-on and push-on pads. The document provides guidance on replacing broken parts like temples, plastic earpiece covers, and nose pads on frames. It notes that soldering, either with a flame or electric unit, is usually required to repair broken metal portions of frames.
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BINOCULAR VISION M.C.Q QUESTION
This document contains questions and answers related to vision and eye health. It addresses topics like:
- The type of phoria that has more esophoria for distance than near fixation
- Where physiologic diplopia is manifest
- An example of a monocular clue excepted
- How exophoria can be corrected
- What occlusion is a treatment for
- What the TNO random test is for
High index
The refractive index is the ratio of the speed of light in a vacuum to the speed of light in a material. Materials with a higher refractive index bend light more and allow for thinner lenses. High index lenses have a refractive index greater than 1.49 for plastics and 1.523 for glass. They provide benefits like thinner and lighter lenses but also have disadvantages like increased chromatic aberration. Common materials used include lanthanum, titanium, and polyurethane.
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This document contains 10 multiple choice questions that test knowledge about various eye conditions and treatments. The questions cover topics like anisometropic amblyopia, crowding phenomena, tests used to measure near visual acuity, penalization as a treatment for anisometropia, which refractive errors are more prone to amblyopia, findings on cover testing, contrast sensitivity in amblyopia patients, treatments for high anisometropia when glasses do not achieve binocular vision, characteristics of different types of squint, and the relationship between distance and near exophoria measurements.
Binocular refraction techniques, binocular balancing & binocular
Binocular refraction techniques aim to evaluate a patient's refractive status under binocular viewing conditions. This allows for the detection of suppression, measurement of stereopsis and fixation disparity. Techniques include using a septum, polarization, or fogging to allow each eye to view separate targets while maintaining binocular fusion. Binocular balancing ensures the retinal images are simultaneously in focus for both eyes. The binocular best sphere finds the spherical prescription providing maximum binocular visual acuity. Binocular refraction at near is also important to evaluate a patient's refractive needs for near vision tasks.
Orthoptics Introduction test
An orthoptic evaluation systematically evaluates the function of eye muscles during binocular eye movements to maintain fusion. It identifies accommodative, vergence, or fusional vergence anomalies to guide orthoptic exercises for treatment. The evaluation includes tests to check for single vision, diplopia, suppression, alignment, and accommodation. Based on symptoms like headaches or blurry vision, further tests are done to diagnose conditions like convergence insufficiency. The evaluation involves tests of phoria, near point of convergence, accommodation, fusional vergence, and accommodative function and facility.
fitting RGP lenses
The document discusses rigid gas permeable contact lenses, including their benefits, applications, fitting process, and lens design considerations. Some key points covered include:
1. RGP lenses can automatically correct astigmatism, provide good vision and eye health benefits like increased oxygen transmission.
2. The fitting process involves evaluating the lens-cornea relationship using fluorescein dye to identify any bearing, clearance or sealing issues.
3. Important lens design factors are the overall diameter, optical zone size, base curve, thickness, and peripheral curve to achieve a proper alignment fit.
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This document provides a collection of 250+ multiple choice questions (MCQs) in optometry and ophthalmology. It aims to help students study for entrance, licensing, and job exams in these fields. The questions cover a range of difficulty levels and come from past exams. Authentic answers are provided from experienced professionals. More similar questions and answers are available at the provided link. The questions are regularly updated to help eye health professionals prepare for various exams.
Frame repairs and tools
The document discusses various tools used for optical repairs, including different types of optical screwdrivers, flaring pliers, and screw-lift tools. It also describes the different types of nose pad assemblies, including screw-on and push-on pads. The document provides guidance on replacing broken parts like temples, plastic earpiece covers, and nose pads on frames. It notes that soldering, either with a flame or electric unit, is usually required to repair broken metal portions of frames.
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Subjective refraction
Subjective refraction is used to find the best corrective lenses for a patient and requires their cooperation. It involves monocular refraction of each eye separately to determine the cylindrical lens power and axis as well as best spherical lens. This is followed by binocular balancing to ensure clear vision with both eyes open. Techniques like fogging, cross-cylinders, and Maddox rods are used in monocular refraction while techniques like fogging with occlusion, duochrome testing, and prism dissociation are used for binocular balancing. Determining the near vision correction involves estimating accommodation amplitude and adding readers if needed for presbyopia.
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- The highly refractive surface of the eye
- Who developed the schematic eye diagram
- The dioptric power of a reduced eye
- What the line joining fixation point and center of rotation is called
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- What against the rule astigmatism means
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Pediatric refraction
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Pantoscopic tilt
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.
Frame slection
This document provides guidance on selecting eyeglass frames. It discusses that the primary purposes of frames are to hold lenses to provide optimal vision and be physically comfortable. Additional considerations for frame selection include appearance, fashion, prescription needs, face shape, coloring, nose shape, hairline, image, work environment, habits, budget, and fashion trends. General guidelines are to ensure proper positioning of lenses within the frames based on factors like face shape, width, brow position, and proportion. Color and frame style should complement the face. Frame material and design should account for prescription, activities, and durability needs. Fashion has also become an important factor in frame selection.
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RGP contact lenses provide better oxygen permeability than soft lenses, making them a good option for higher prescriptions or conditions like keratoconus. Key factors in fitting RGP lenses include assessing the patient's cornea, measuring their prescription, pupil size, and lid characteristics to select the appropriate trial lens. During the fitting, the practitioner evaluates the lens's dynamic movement, static position, centration, and the patient's vision to determine the right lens parameters to order.
Measuring interpupillary distance
This document discusses pupil distance (PD), which is the distance between the centers of the pupils. It provides information on measuring binocular PD, monocular PD, and near PD. Binocular PD is measured from one pupil to the other using a ruler. Monocular PD measures each eye individually. Near PD is needed for reading glasses and is measured at a closer distance. Accurate PD measurement is important for properly positioning lenses in prescription glasses.
Bifocals PPT
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Vertex distance and power
Vertex distance is the distance between the back surface of a corrective lens and the front of the cornea. Increasing or decreasing this distance changes the effective power of the lens. Vertex distance is important when converting between glasses and contact lens prescriptions, especially for prescriptions over +/- 4.00 diopters. The standard vertex distance is about 12mm, but individual frames may have different distances. The effective power of a lens varies with vertex distance, with plus lenses becoming stronger and minus lenses becoming weaker if the distance increases. Proper measurement of vertex distance is important for an accurate prescription.
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This document contains a table of contents listing various topics in ophthalmology (e.g. optics, pharmacology, neuro-ophthalmology) and the number of multiple choice questions under each topic. It then provides 45 multiple choice questions in the section on optics, covering topics like refractive errors, lenses, mirrors, contact lenses and other optics concepts. The questions are in a question-answer multiple choice format.
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The document provides an overview of optical dispensing. It discusses defining optical dispensing and the steps involved, including frame selection based on facial shape, frame measurements, lens measurements, counseling patients on lens materials and coatings, and the process of fitting lenses into frames which involves marking, cutting, and edging lenses.
Lensometry (Focimeter)
This document discusses methods for detecting the type and power of lenses. It covers hand neutralization techniques for spherical and astigmatic lenses using convex and concave lenses. It also describes using a Geneva lens measure and manual and automated focimeters. The manual focimeter involves aligning mires to determine spherical and cylinder power of single vision, bifocal, trifocal and progressive lenses. The automated focimeter uses a light beam to precisely measure lens parameters. Both tools have limitations, with the automated version providing more accuracy.
Subjective refraction
Subjective refraction is used to find the best corrective lenses for a patient and requires their cooperation. It involves monocular refraction of each eye separately to determine the cylindrical lens power and axis as well as best spherical lens. This is followed by binocular balancing to ensure clear vision with both eyes open. Techniques like fogging, cross-cylinders, and Maddox rods are used in monocular refraction while techniques like fogging with occlusion, duochrome testing, and prism dissociation are used for binocular balancing. Determining the near vision correction involves estimating accommodation amplitude and adding readers if needed for presbyopia.
Trifocals
Trifocals are eyeglass lenses that correct vision at three distances: distance, intermediate, and near. They were patented in 1827 and are meant for occupational use rather than general wear. Trifocals have three focal points to correct distance, intermediate vision used at arm's length, and near vision for reading. Common professions that use trifocals include electricians, librarians, and musicians. Trifocals come in several styles like split, cemented, fused, and solid trifocals. They are dispensed by positioning the intermediate portion between the distance and near portions.
Mcq in optometry
This document contains 20 multiple choice questions related to optometry. Some key topics covered in the questions include:
- The image formed by a prism
- The refractive power of an emmetropic eye
- The highly refractive surface of the eye
- Who developed the schematic eye diagram
- The dioptric power of a reduced eye
- What the line joining fixation point and center of rotation is called
- What instrument is used to measure vertex distance of a lens
- What against the rule astigmatism means
- What condition pseudo myopia is found in
- The normal range for fusional convergence
- How much convergence occurs for each diopter of accommodation
- What 1.5
Jackson cross cylinder
The document discusses the Jackson Cross Cylinder (JCC) test, which is used during refraction to detect and refine astigmatism. The JCC is a combination of two cylinders of equal strength but opposite signs, placed at right angles to each other. During the test, the JCC is held in different positions before the eye to see if there is a change in visual acuity. If a position is clearer, it indicates the axis of astigmatism. The test is then used to refine the axis and power of any astigmatic correction.
Frame adjustment and quality checking
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.
Optics of RGP contact lens
This document summarizes key points about rigid gas permeable (RGP) contact lenses. It discusses how RGP lenses are made of permeable materials that are rigid like PMMA but allow oxygen permeability. RGP lenses are chosen for conditions like astigmatism, irregular astigmatism, keratoconus, and after refractive surgery/grafts due to their ability to correct high prescriptions and provide oxygen. The document outlines fitting philosophies for different corneal shapes and conditions, including how the tear lens interacts with spherical and toric RGP lenses. It also discusses special considerations for fitting RGP lenses after procedures like penetrating keratoplasty and radial keratotomy.
9 maddox wing test.........arya
This document describes a test used to measure heterophoria at near distance. The test works by having the right eye see a vertical and horizontal arrow while the left eye sees vertical and horizontal lines of numbers. The patient reports which numbers the arrows appear to point to in order to measure any horizontal, vertical, or cyclophoric deviations between the two eyes. Key advantages are that it allows simultaneous measurement of multiple types of phorias and relies on accommodation, though it is subjective and cannot be used if accommodation is impaired.
Pediatric refraction
This document discusses pediatric refraction and various techniques used for refracting children. Pediatric refraction is different from adult refraction due to active accommodation in children. Cycloplegic refraction is preferable to paralyze accommodation. Different techniques are used based on the age of the child, including near retinoscopy, dynamic retinoscopy, and book retinoscopy. Cycloplegics help obtain an accurate refraction by paralyzing accommodation.
Pantoscopic tilt
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.
Frame slection
This document provides guidance on selecting eyeglass frames. It discusses that the primary purposes of frames are to hold lenses to provide optimal vision and be physically comfortable. Additional considerations for frame selection include appearance, fashion, prescription needs, face shape, coloring, nose shape, hairline, image, work environment, habits, budget, and fashion trends. General guidelines are to ensure proper positioning of lenses within the frames based on factors like face shape, width, brow position, and proportion. Color and frame style should complement the face. Frame material and design should account for prescription, activities, and durability needs. Fashion has also become an important factor in frame selection.
Spherical RGP contact lens fitting and prescribing
RGP contact lenses provide better oxygen permeability than soft lenses, making them a good option for higher prescriptions or conditions like keratoconus. Key factors in fitting RGP lenses include assessing the patient's cornea, measuring their prescription, pupil size, and lid characteristics to select the appropriate trial lens. During the fitting, the practitioner evaluates the lens's dynamic movement, static position, centration, and the patient's vision to determine the right lens parameters to order.
Measuring interpupillary distance
This document discusses pupil distance (PD), which is the distance between the centers of the pupils. It provides information on measuring binocular PD, monocular PD, and near PD. Binocular PD is measured from one pupil to the other using a ruler. Monocular PD measures each eye individually. Near PD is needed for reading glasses and is measured at a closer distance. Accurate PD measurement is important for properly positioning lenses in prescription glasses.
Bifocals PPT
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.
Vertex distance and power
Vertex distance is the distance between the back surface of a corrective lens and the front of the cornea. Increasing or decreasing this distance changes the effective power of the lens. Vertex distance is important when converting between glasses and contact lens prescriptions, especially for prescriptions over +/- 4.00 diopters. The standard vertex distance is about 12mm, but individual frames may have different distances. The effective power of a lens varies with vertex distance, with plus lenses becoming stronger and minus lenses becoming weaker if the distance increases. Proper measurement of vertex distance is important for an accurate prescription.
Decentration and prismatic effect in lens (1)
Decentration of lenses can induce unwanted prism. The amount of induced prism depends on the distance of decentration from the optical center and the power of the lens. For plus lenses, the base of the induced prism is in the direction of decentration, while for minus lenses it is in the opposite direction. Prism power can be calculated using Prentice's rule. The induced prism from decentration can have effects on binocular vision and eye alignment. Careful centration of lenses is important for optimal vision and comfort.
460 ophthalmology mcqs & answers
This document contains a table of contents listing various topics in ophthalmology (e.g. optics, pharmacology, neuro-ophthalmology) and the number of multiple choice questions under each topic. It then provides 45 multiple choice questions in the section on optics, covering topics like refractive errors, lenses, mirrors, contact lenses and other optics concepts. The questions are in a question-answer multiple choice format.
Optics of ocular structure
The document summarizes key optical structures and properties of the eye. It describes the cornea as having a convex shape that refracts light and protects the eye. It then discusses the aqueous humor, crystalline lens, and vitreous humor, noting their roles in refraction due to differences in density. Schematic and reduced eye models are presented, including cardinal points and refractive indices. Common refractive errors like myopia and hyperopia are also outlined.
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This lecture was delivered on 21 March 2017 at Mojibunnessa eye hospital for FCPS (Final part students)
Heterophoria and Heterotropia
Heterophoria and heterotropia refer to relative and manifest deviations of the visual axes. Statement b is wrong - in heterophoria, motor fusion is adequate to maintain alignment only when viewing with both eyes, not in higher degrees of heterophoria where suppression and high stereoscopic thresholds may be present. The most common type of phoria associated with uncorrected hyperopia is exophoria. Exophoria is also more common in hypermetropia. Oculomotor nerve palsy may be congenital, causes pupil involvement suggesting a medical cause, and warrants neuro-radiological investigation rather than just laser treatment.
MCQ of ophthalmology(eyelids)
The document provides information about anatomy and disorders of the eyelid:
- The eyelids perform the important function of spreading tears over the cornea. The palpebral aperture is the space between the upper and lower lids. The lid margin helps in drainage of tears via the lacrimal pump system.
- Disorders mentioned include blepharitis, styes, entropion, ectropion, and tumors. Bacterial blepharitis is caused by Staphylococci and can cause ulcers and redness of the lid margin. Tumors include benign papillomas and malignant carcinomas such as basal cell carcinoma and sebaceous gland carcinoma.
- Embryology details
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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.
Optics of vision bcqs
This document contains a 25 question quiz on optics of the eye. It covers topics like the structures of the eye, their functions, refractive errors like myopia and hypermetropia, accommodation, and other eye-related concepts like cataracts and glaucoma. The questions are multiple choice with one right answer out of 5 options for each question.
Cataracts survey form (1)
This survey collects information about cataracts disease for a statistics project in mathematics. It contains 20 multiple choice questions about cataracts, including what age group and gender they are most common in, possible causes, symptoms, treatment options like surgery, and recovery time. The survey gathers data on respondents' knowledge and perceptions of cataracts to be analyzed for the mathematics project.
Objective structured practical question
1) I am Dr Md Anisur Rahman Anjum passed MBBS from Dhaka Medical College in 1987. Diploma in Ophthalmology (DO) from the then IPGM&R (now it is Bangabandhu Sheikh Mujib Medical University BSMMU) in 1993. Felllowship in Ophthalmology FCPS from Bangladesh College of Physician and surgeon in 1997. I am now working as associate professor in General Ophthalmology in National Institute of Ophthalmology Dhaka Bangladesh which is the tertiary centre in eye care in Bangladesh.
These OSPE are dedicated to the postgraduate student who are decided to builds their carrier in ophthalmology. I hope that they will be benefitted if they solve these OSPE
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This Dissertation explores the particular circumstances of Mirzapur, a region located in the
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Syllabus
Chapter-1
Introduction to objective, scope and outcome the subject
Chapter 2
Introduction: Scope and Specialization of Civil Engineering, Role of civil Engineer in Society, Impact of infrastructural development on economy of country.
Chapter 3
Surveying: Object Principles & Types of Surveying; Site Plans, Plans & Maps; Scales & Unit of different Measurements.
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Chapter 4
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Chapter 5
Transportation: Introduction to Transportation Engineering; Traffic and Road Safety: Types and Characteristics of Various Modes of Transportation; Various Road Traffic Signs, Causes of Accidents and Road Safety Measures.
Chapter 6
Environmental Engineering: Environmental Pollution, Environmental Acts and Regulations, Functional Concepts of Ecology, Basics of Species, Biodiversity, Ecosystem, Hydrological Cycle; Chemical Cycles: Carbon, Nitrogen & Phosphorus; Energy Flow in Ecosystems.
Water Pollution: Water Quality standards, Introduction to Treatment & Disposal of Waste Water. Reuse and Saving of Water, Rain Water Harvesting. Solid Waste Management: Classification of Solid Waste, Collection, Transportation and Disposal of Solid. Recycling of Solid Waste: Energy Recovery, Sanitary Landfill, On-Site Sanitation. Air & Noise Pollution: Primary and Secondary air pollutants, Harmful effects of Air Pollution, Control of Air Pollution. . Noise Pollution Harmful Effects of noise pollution, control of noise pollution, Global warming & Climate Change, Ozone depletion, Greenhouse effect
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1. Palancharmy, Basic Civil Engineering, McGraw Hill publishers.
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Ophthalmology and Optometry multiple Choice Questions.... Optometry Fans
- 1. Ophthalmology and Optometry MCQ Optometry fans www.optometry.fans
- 2. 1. In cycloplegic retinoscopy using 1% atropine, the amount of diopters deducted... A. 0.00D B. 0.50D C. 1.00D D. 1.50D
- 3. 2. In retinoscopy, Use of cycloplegic drugs are contraindicated in patients... A. Primary open angle glaucoma B. Primary angle closure glaucoma C. Cataract D. Spasm of Accommodation
- 4. 3. Which of the following is the best term that implies perfect vision ? A. Ametropia B. Emmetropia C. Isometropia D. Orthophoria
- 5. 4. Temporal crescent is seen typically in a. astigmatism b. hypermetropia c. myopia d. none of the above
- 6. 5. Optical condition of the eye in which the refraction of the two eyes differs is a. Isometroia b. Anisocoria c. anisometropia d. compound astigmatism
- 7. 6. Out of the following which is the shortest acting mydriatic A. Tropicamide B. Homatropine C. Cyclopentolate D. atropine
- 8. 7. People with which type refractive error are at high For PACG a. Myopia b. Hypermetropia c. Astigmatism d. Presbyopia
- 9. 8. The total refractive power of the aphakic eye is A. 38D B. 43D C. 60D D. 20D
- 10. 9. Water silk appearance in retina is seen in A. Pathological myopia B. Simple myopia C. Hypermetropia D. High astigmatism
- 11. 10. Test not used in astigmatism A. Stenopaeic slit B. Maddox V C. Jackson's cross cylinder D. Bagolini striated glasses
- 12. 11. Anisometropia up to how much Diopters is well tolerated A. 0.5 D B. 1.0 D C. 2.5 D D. 5.0 D
- 13. 12. Infants are born with A. Myopia B. Hypermetropia C. Astigmatism D. Emmetropia
- 14. 13. Simple myopia usually does not exceed A. 9D B. 3D C. 6D D. 12D
- 15. 14. Which of the following is degenerative myopia A. Congenital B. Simple C. Pathological D. All
- 16. 15. Radial keratotomy is used to correct A. Myopia B. Hypermetropia C. Astigmatism D. Presbyopia
- 17. 16. Blurring of vision for near work occurs in a. hypermetropia b. presbyopia c. both of the above d. none of the above
- 18. 17. If axial length is increased, IOL power will A. Increase B. Decrease C. Remain same D. None
- 19. 18. Unilateral aphakia is best corrected by A. Contact lens B. Intraocular lens implant C. Spectacles D. none
- 20. 19. In a simple microscope lens used is __________ A. Biconvex B. Biconcave C. Plano convex D. cylindrical
- 21. 20. A convex lens is called _________ A. Converging lens B. Diverging lens C. Both converging and diverging lens D. refracting lens