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26 Cards in this Set
- Front
- Back
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The eye is made up of three layers, they are the:
A. Sclera, choroid, and retina B. Fibrous Tunic, vascular tunic, and nervous tunic C. Iris, choroid, and retina D. Cornea, iris, and retina |
B. Fibrous tunic, vascular tunic, and nervous tunic
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The cornea consists of five layers which in order from anterior to posterior are:
A. Bowmans membrane, epithelium, endothelium, stroma, descemets membrane B. Epithelium, descemets membrane, stroma, Bowmans membrane, endothelium C. Epithelium, Bowmans membrane, stroma, descemets membrane, endothelium D. Endothelium, descemets membrane, stroma, Bowmans membrane, epithelium |
C. Epithelium, Bowmans membrane, stroma, descemets membrane, endothelium
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The amount of light entering the eye is controlled by the:
A. Pupil B. Iris C. Crystalline lens D. Fovea |
B. Iris
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There are approximately __ million rods located mainly in the periphery of the retina and __ million cones located centerally in the retina.
A. 6, 120 B. 2, 160 C. 160, 2 D. 120, 6 |
D. 120, 6
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The term for refractive condition where light comes to a focus directly on the retina:
A. Hyperopia B. Myopia C. Emmetropia D. Astigmatism |
C. Emmetropia
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The term for the refractive condition where light comes to a focus behind the retina:
A. Hyperopia B. Myopia C. Emmetropia D. Astigmatism |
A. Hyperopia
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The term for the refractive condition where light comes to focus in front of the retina:
A. Hyperopia B. Myopia C. Emmetropia D. Astigmatism |
B. Myopia
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A term for the refractive condition where light comes to a focus on two different points:
A. Hyperopia B. Myopia C. Emmetropia D. Astigmatism |
D. Astigmatism
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The onset of presbyopia generally begins at the age:
A. 40 B. 45 C. 50 D. 55 |
A. 40
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The 6 extraoccular muscles responsible for the stabilization of the eye are:
A. Lateral rectus, medial rectus, superior rectus, inferior rectus, superior oblique, inferior oblique B. Lateral rectus, medial rectus, superior rectus, inferior rectus, nasal oblique, temporal oblique C. Nasal rectus, temporal rectus, superior rectus, inferiors rectus, superior oblique, inferior oblique D. Lateral nasal, medial temporal, superior rectus, inferior rectus, superior oblique, inferior oblique |
A. Lateral rectus, medial rectus, superior rectus, inferior rectus, superior oblique, inferior oblique
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When the eye has a tendancy to turn from its normal position it is called:
A. Tropia B. Exotropia C. Phoria D. Exophoria |
C. Phoria
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When the eye has a definite or obvious turning from its original position it is called:
A. Tropia B. Exotropia C. Phoria D. Exophoria |
A. Tropia
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Phorias and tropias are further defined by their direction of movement: __ as meaning outwards(temporally), __ as meaning inward(nasaly), __ as meaning downward, and __ as meaning upward. (Place them in the correct order)
A. Eso, exo, hypo, hyper B. Exo, eso, hyper, hypo C. Hypo, hyper, exo, eso D. Exo, eso, hypo, hyper |
D. Exo, eso, hypo, hyper
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We really see with our __.
A. Eyes not our brain B. Brain not our eyes C. Glasses not our eyes D. Visual axis not our brain |
B. Brain not our eyes
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A perfect human eye is said to be__.
A. Myopic B. Emmetropic C. Hyperopic D. Superopic |
B. Emmetropic
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Everyone will suffer from __ if they live long enough.
A. Myopia B. Hyperopia C. Presbyopia D. Astigmatism |
C. Presbyopia
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Astigmatism means that the patient's cornea is __.
A. Clear B. Misshapen C. Cloudy D. Round |
B. Misshapen
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The fibrous tunic consists of the:
A. Iris and cornea B. Retina and optic disc C. Sclera and cornea D. Sclera and choroid |
C. Sclera and cornea
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Fusion occurs in the:
A. Retina B. Optic nerve C. Brain D. Cornea |
C. Brain
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Aqueous humor is produced by the:
A. Ciliary body B. Choroid C. Cholera D. Canal of the Schlemm |
A. Ciliary body
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The index of refraction of the cornea is:
A. 1.33 B. 1.37 C. 1.49 D. 1.58 |
B. 1.37
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When light entering the eye, without corrective lenses, comes to a focus partially in front of the retina and partially in back of the retina, the patient's refractive error is ____.
A. Myopia B. Hyperopia C. Mixed astigmatism D. Antimetropia |
C. Mixed astigmatism
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When light entering the eye, without corrective lenses, comes to a focus in front of the retina, the patient's refractive error is ____.
A. Myopia B. Presbyopia C. Hyperopia D. Antimetropia |
A. Myopia
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The patient normally has no need for any visual correction for distance, but does require prescription lenses to see well at near. This patient's refractive error is known as:
A. Myopia B. Presbyopia C. Hyperopia D. Mixed astigmatism |
B. Presbyopia
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An Rx with the O.D. minus and the O.S. plus is an obvious case of ____.
A. Emmetropia B. Antimetropia C. Hetermetropia D. Isometropia |
B. Antimetropia
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Accommodation is defined as __.
A. Light rays entering the eye B. The act of the crystalline lens changing its shape to focus for objects at varying distances C. The refracting power of the cornea D. A reductions of visual acuity with no apparent cause |
B. The act of the crystalline lens changing its shape to focus for objects at varying distances
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