| ocular cone | The cone of light in the interior of the eyeball with the base formed by the rays entering through the pupil and the apex focused on the retina. (05 Mar 2000) |
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| ocular crisis | Sudden and severe pain in the eyes. (05 Mar 2000) |
| ocular cup | The double-walled cup formed by the invagination of the embryonic optic vesicle; its inner component becomes the sensory layer of the retina, its outer layer, the pigment layer. Synonym: caliculus ophthalmicus, ocular cup. (05 Mar 2000) |
| ocular dysmetria | Abnormality of ocular movements in which the eyes overshoot on attempting to fixate an object. (05 Mar 2000) |
| ocular flutter | A spontaneous, brief, intermittent, horizontal oscillation of the eyes occurring during fixation; it often coexists with ocular dysmetria in cerebellar syndromes. (05 Mar 2000) |
| ocular humor | One of the two humor's of the eye: aqueous and vitreous. (05 Mar 2000) |
| ocular hypertelorism | <clinical sign, ophthalmology> Extreme width between the eyes, mental retardation may be associated. (13 Nov 1997) |
| ocular hypertension | A condition in which the intraocular pressure is elevated above normal and which may lead to glaucoma. (12 Dec 1998) |
| ocular hypotension | Abnormally low intraocular pressure often related to chronic inflammation (uveitis). (12 Dec 1998) |
| ocular larva migrans | Visceral larva migrans involving the eyes, primarily of older children; clinical symptoms include decreased visual acuity and strabismus. (05 Mar 2000) |
| ocular lens | <physics> The lens nearest the eye in any ocular. (05 Aug 1998) |
| ocular lymphomatosis | See: avian lymphomatosis. (05 Mar 2000) |
| ocular micrometer | A glass disk that fits in a microscope eyepiece and that has a ruled scale; when calibrated with a slide micrometer, direct measurements of a microscopic object can be made. (05 Mar 2000) |
| ocular migraine | Vasospastic infarction of tissue in or about the eye during an otherwise typical migraine; a form of complicated migraine. (05 Mar 2000) |
| ocular motility disorders | Disorders of eye movement resulting from malfunction of the sensory-motor mechanism of the eye which leads to faulty alignment of the eyes and/or visual impairment. (12 Dec 1998) |