Term
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Definition
| process by which a clear visual image is maintained as the gaze is shifted from a far to a near point. |
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Definition
| Visual distortion that results from an uneven curvature of the cornea or lens in which light rays focus on 2 different points on the retina |
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Definition
| An opacity of the lens that distorts the image projected onto the retina and that can progress to blindness |
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Definition
| the paralysis of the cillary muscles by medications that block mucarinic receptors. Cyclopegia causes blurred vision b/c the shape of the lens can no longer be adjusted to near vision |
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Definition
| increased intraocular pressure as a result of inadequate drainage of aqueous humor or overproduction of aqueous humor. |
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Term
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Definition
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Term
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Definition
| the best visual acuity with corrective lenses is 20/200 or less or the visual field is no greater than 20 degrees |
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Definition
| A blurred central vision caused by progressive degeneration of the center of the retina. The condition my be atrophic or age related |
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Term
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Definition
| constriction of the pupil. It is seen with pilocarpine drops when treating glaucoma, use of opiods, or when there is brain damage |
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Definition
| medication that dialates the pupil |
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Definition
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Definition
| separation of layers of the retina because of the accumulation of fluid between them or because both retinal layers elevate away from choroid |
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Term
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Definition
| the bony structure of the skull that surrounds the eye |
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Term
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Definition
| 1 inch in diameter and is located in the anterior portion of the orbit |
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Term
| the external layer of the eye contains what? |
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Definition
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Term
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Definition
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| what does the middle layer of the eye consists of? |
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Definition
1. choroid
2. ciliary body
3. iris |
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Term
| the middle layer of the eye is aka |
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Definition
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Term
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Definition
| dark brown membrane located between the sclear and the retina that prevents light from reflecting internally |
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Definition
| many blood vessels and provides nutrients to the retina |
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Term
| what does the ciliary body do? |
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Definition
1. secretes aqueous humor that helps give the eye its shape
2. connects the choroid to the iris |
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Term
| the internal layer of the eye consists of ___. |
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Definition
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Definition
| the visual receptive layer of the eye in which light waves are changed into nerve impulses |
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Term
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Definition
| blood vessels and photoreceptors called rod and cones |
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Term
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Definition
| the choroid and the sclera on the outside and the vitreous on the inside |
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Term
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Definition
| in charge of peripheral vision and function and seeing in low light/darkness |
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Term
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Definition
| in charge of color vision and central vision and seeing in the light. |
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