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Definition
| 3. The adjustment of the eye for various distances whereby it is able to focus the image of an object on the retina by changing the curvature of the lens. |
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Definition
| A form of ametropia in which the refraction of a ray of light is spread over a diffuse area rather than sharply focused on the retina. |
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Definition
| An island-like blind spot in the visual field. |
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Definition
| Abnormal anterior protrusion of the eyeball. |
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Term
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Definition
1. Causing pupillary dilatation.
2. A drug that dilates the pupil, such as atropine, cocaine, ephedrine, euphthalmine, and homatropine.
In certain eye diseases, it is essential that the pupil be dilated during the course of treatment to prevent adhesions of the pupils. |
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Term
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Definition
Divergent strabismus; abnormal turning outward of one or both eyes. |
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Term
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Definition
| 1. The removal of heat (e.g., use of ice compresses) from a body part to decrease cellular metabolism, improve cellular survival, decrease inflammation, decrease pain and muscle spasm, and promote vasoconstriction. |
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Definition
| Absence of the crystalline lens of the eye. |
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Definition
| 1. The moving of two or more objects toward the same point. |
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Definition
Two images of an object seen at the same time.
(double vision) |
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Term
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Definition
1. An agent that causes the pupil to contract, such as eserine or pilocarpine.
2. Pert. to or causing contraction of the pupil.
3. Diminishing |
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Term
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Definition
| Marked turning inward of the eye; crossed eyes. |
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Definition
| Dropping or drooping of an organ or part, as the upper eyelid from paralysis, or the visceral organs from weakness of the abdominal muscles. |
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Term
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Definition
Paralysis of the ciliary muscle.
This can be an anticholinergic side effect of antipsychotic or antidepressant medications. |
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Term
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Definition
An error in refraction in which light rays are focused in front of the retina, enabling the person to see distinctly for only a short distance.
(nearsightedness) |
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Term
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Definition
An instrument used for examining the interior of the eye, esp. the retina. |
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Term
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Definition
| 1. Deflection from a straight path, as of light rays as they pass through media of different densities; the change in direction of a ray when it passes from one medium to another of a different density. |
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Term
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Definition
| Unilateral or bilateral decrease of best corrected vision in an otherwise healthy eye, commonly due to asymmetric refractive error or strabismus. |
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Term
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Definition
Involuntary back-and-forth or cyclical movements of the eyes.
The movements may be rotatory, horizontal, or vertical and often are most noticeable when the patient gazes at objects moving by rapidly or at fixed objects in the peripheral field of view.
(nod) |
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Term
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Definition
| Unusual intolerance of light, occurring in measles, rubella, meningitis, and inflammation of the eyes. |
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Definition
A group of eye diseases characterized by increased intraocular pressure, resulting in atrophy of the optic nerve. |
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Definition
A disorder of the eye in which optic axes cannot be directed to the same object
(Squinting) |
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Definition
| Separation of the inner sensory layer of the retina from the outer pigment epithelium. |
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Term
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Definition
| Separation of the inner sensory layer of the retina from the outer pigment epithelium. |
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Term
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Definition
Abbreviation: MD.
Loss of pigmentation in the macular region of the retina, usually affecting those over 50. It is a common disease of unknown cause that produces central visual field loss and is the leading cause of permanent visual impairment in the U.S. By age 75 |
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Term
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Definition
| corneal abrasion/ulceration. |
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