| eyes, cataracts | Clouding of the lens portion of the eye. Cataracts will affect most people if they live long enough. Symptoms include double or blurred vision and sensitivity to light and glare. Cataracts can be diagnosed when the doctor examines the eyes with a viewing instrument. The ideal treatment for cataracts is surgical implantation of a new lens. Sunglasses can help to prevent cataracts. (12 Dec 1998) |
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| eyes, glaucoma | Disease (there is more than one type) characterised by increased pressure within the eye. Glaucoma can lead to blindness. Glaucoma is five times more likely to occur in Blacks than in Whites. Early detection of glaucoma is essential to the preservation of vision. Glaucoma can be treated with medications, laser or traditional surgery. (12 Dec 1998) |
| eyespot | <zoology> A simple visual organ found in many invertebrates, consisting of pigment cells covering a sensory nerve termination. An eyelike spot of colour. Source: Websters Dictionary (01 Mar 1998) |
| eyestalk | <zoology> One of the movable peduncles which, in the decapod Crustacea, bear the eyes at the tip. Source: Websters Dictionary (01 Mar 1998) |
| eyestone | 1. A small, lenticular, calcareous body, especially. An operculum of a small shell of the family Tubinid, used to remove a foreign sub stance from the eye. It is rut into the inner corner of the eye under the lid, and allowed to work its way out at the outer corner, bringing with the substance. 2. <chemical> Eye agate. See Eye. Source: Websters Dictionary (01 Mar 1998) |
| eyestrain | Term generally used to describe complaints related to refractive error, ocular muscle imbalance, including pain or aching around the eyes, burning and itchiness of the eyelids, ocular fatigue, and headaches. (12 Dec 1998) |
| conjugate deviation of the eyes | Rotation of the eyes equally and simultaneously in the same direction, as occurs normally, a condition in which both eyes are turned to the same side as a result of either paralysis or muscular spasm. (05 Mar 2000) |
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| conjugate movement of eyes | Rotation of the two eyes in the same direction. See: version. (05 Mar 2000) |
| crossed eyes | <clinical sign> A deviation of the eye which the patient cannot overcome. The visual axes assume a position relative to each other different from that required by the physiological conditions. The various forms of strabismus are spoken of as tropias, their direction being indicated by the appropriate prefix, as cyclo tropia, esotropia, exotropia, hypertropia and hypotropia. Also called cast, heterotropia, manifest deviation and squint. Origin: Gr. Strabismos = a squinting (18 Nov 1997) |
| spectacle eyes | A condition in rats caused by pantothenic acid deficiency, and possibly lack of inositol as well, in which a hairless ring of inflamed skin surrounds the eye's. (05 Mar 2000) |
| nine-eyes | <zoology> The lamprey. Source: Websters Dictionary (01 Mar 1998) |
| disconjugate movement of eyes | Rotation of the two eyes in opposite directions, as in convergence or divergence. (05 Mar 2000) |