Optics 7 - Study Guide Exam Questions
and Answers Graded A+
The Blind - Correct answer-All ability to see is lost - some light, shadows
perception or NLP - No Light Perception
Low Vision - Correct answer-eyesight that cannot be corrected with eyeglasses,
contact lenses, or surgery. Best corrected visual acuity is 20/40. Population over 40
years of age.
Causes are: macular degeneration, diabetic retinopathy, glaucoma and cataracts.
Visual Acuity (VA) - Correct answer-clarity or sharpness of vision for either
distance or near
Snellen Chart - Correct answer-chart containing letters that is used in the testing of
visual acuity. Always start with the right eye.
Autorefractor - Correct answer-a computerized instrument used to generate an
approximation of prescription. It gives the doctor a starting point for refraction.
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, Retinoscope - Correct answer-handheld instrument used to perform a refraction.
The examiner shines light into the patients eye and observes the reflection off the
patients retina.
Ophthalmascope - Correct answer-instrument for examining the eye. It inspects the
internal structure and checks for overall retinal health.
Tonometer - Correct answer-instrument used to measure intra-ocular pressure.
Used to diagnose glaucoma.
Ishihara Test - Correct answer-tests for color vision. We record the number correct
over the number tested. 7/7
Visual Field - Correct answer-Tests peripheral vision; the whole area that you can
see without moving your head or eyes
DFE - Correct answer-Dilated Fundus Exam. When dilation is performed. DFE is
typically covered by most vision insurances.
Retinal Imaging - Correct answer-produce image of almost entire retina without
having to dilate the pupils. It checks the retina more thoroughly. Doctors can detect
any tears holes or bleeding. Not typically covered by most vision insurances.
Comprehensive Exam - Correct answer-It includes AT MINIMUM DFE.
Sometimes visual fields, tonometer and color perception.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
and Answers Graded A+
The Blind - Correct answer-All ability to see is lost - some light, shadows
perception or NLP - No Light Perception
Low Vision - Correct answer-eyesight that cannot be corrected with eyeglasses,
contact lenses, or surgery. Best corrected visual acuity is 20/40. Population over 40
years of age.
Causes are: macular degeneration, diabetic retinopathy, glaucoma and cataracts.
Visual Acuity (VA) - Correct answer-clarity or sharpness of vision for either
distance or near
Snellen Chart - Correct answer-chart containing letters that is used in the testing of
visual acuity. Always start with the right eye.
Autorefractor - Correct answer-a computerized instrument used to generate an
approximation of prescription. It gives the doctor a starting point for refraction.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, Retinoscope - Correct answer-handheld instrument used to perform a refraction.
The examiner shines light into the patients eye and observes the reflection off the
patients retina.
Ophthalmascope - Correct answer-instrument for examining the eye. It inspects the
internal structure and checks for overall retinal health.
Tonometer - Correct answer-instrument used to measure intra-ocular pressure.
Used to diagnose glaucoma.
Ishihara Test - Correct answer-tests for color vision. We record the number correct
over the number tested. 7/7
Visual Field - Correct answer-Tests peripheral vision; the whole area that you can
see without moving your head or eyes
DFE - Correct answer-Dilated Fundus Exam. When dilation is performed. DFE is
typically covered by most vision insurances.
Retinal Imaging - Correct answer-produce image of almost entire retina without
having to dilate the pupils. It checks the retina more thoroughly. Doctors can detect
any tears holes or bleeding. Not typically covered by most vision insurances.
Comprehensive Exam - Correct answer-It includes AT MINIMUM DFE.
Sometimes visual fields, tonometer and color perception.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
