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25 Cards in this Set
- Front
- Back
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what parts of the human eye can be related to the lens, focusing mechanism, and film of a camera? |
cornea, lens, and retina |
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What part of the retina lies on the visual axis? |
the macula |
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Which of these diseases is not a condition of the retina? *macular degeneration *glaucoma *diabetic retinopathy *retinitis pigmentosa |
glaucoma |
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what are the intrinsic muscles of the eye? |
the dilator and sphincter muscles |
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What is the main focusing structure of the eye? |
crystalline lens |
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Which of these is not an abnormal condition of the crystalline lens? *presbyopia *aphakia *accommodation *cataract |
accommodation |
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Which patient is almost always accommodating with the crystalline lens? *An astigmat *a myope *a hyperope *a presbyope |
hyperope |
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what is a common reason for a refractionist to instill a cycloplegic eye drop? |
to refract a young hyperope |
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What is the condition in which one eye needs a plus lens and the other eye needs a minus lens? |
antimetropia |
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amblyopia, sometimes called lazy eye, is a condition in which... |
a patient has a functioning eye that is non- seeing |
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what problem will cause an axial eye deficiency? |
the globe is too large |
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which of these is not a monocular deficiency? *mixed astigmatism *presbyopia *myopia *hypermetropia |
presbyopia |
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If a patient has a globe that is slightly larger than 1 inch, the patient will most likely have: |
myopia |
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Where are the images located in an uncorrected eye that has simple hyperopic astigmatism? |
one on the retina, the other behind the retina |
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Determine the type of astigmatism according to this prescription: -0.25 -0.25 x105 |
Compound myopic astigmatism |
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What parameters can be used to create an iseikonic lens? *index of refraction *lens thickness *vertex distance *any of the above |
any of the above |
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what is the diagnosis for this patient? +11.50 DS OU Add 3.00 one month ago, +0.50 DS OD/ +11.50 DS OS Add 3.00 now |
pseudophakic in both eyes |
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what is the test to help determine color deficiencies? |
The Ishihara test |
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Is an auto refractor all that is needed to give a patient their final prescription? why? |
no. the machine cannot account for internal astigmatism |
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Why might an optometrist ask you to perform a test using a tonometer? |
to reveal excessive intraocular pressure in the patients eye (a sign of glaucoma) |
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How far from the Snellen chart must a patient be standing or sitting? |
optical infinity |
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In Optics, what does NLP mean? |
no light perception |
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Does medicare cover the cost of glasses? |
Yes, only the first pair after cataract surgery |
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What is an early symptom of macular degeneration? |
Blurriness of central vision |
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What is the best treatment of diabetic retinopathy? |
blood sugar control |
