| OSA | obstructive sleep apnea; Office of Services to the Aging; Optical Society of America; ovarian sectio... |
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| OSAS | obstructive sleep apnea syndrome |
| PMS | patient management system; perimenstrual syndrome; periodic movements during sleep; phenazine methos... |
| PS | pacemaker syndrome; paired stimulation; paradoxical sleep; paraspinal; parasympathetic; Parkinson sy... |
| PSA | parasternal short axis; pleomorphic salivary gland adenoma; polyethylene sulfonic acid; polysacchari... |
| photopic eye | An eye that has been exposed to light, with bleaching of rhodopsin (visual purple) and insensitivity to low illumination. Synonym: photopic eye. (05 Mar 2000) |
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| wall-eye | 1. An eye in which the iris is of a very light gray or whitish colour; said usually of horses. Jonson has defined wall-eye to be "a disease in the crystalline humor of the eye; glaucoma." But glaucoma is not a disease of the crystalline humor, nor is wall-eye a disease at all, but merely a natural blemish. In the north of England, as Brockett states, persons are said to be wall-eyed when the white of the eye is very large and distorted, or on one side. 2. <zoology> An American fresh water food fish (Stizostedion vitreum) having large and prominent eyes; called also glasseye, pike perch, yellow pike, and wall-eyed perch. A California surf fish (Holconotus argenteus). The alewife; called also wall-eyed herring. See: Wall-eyed. Source: Websters Dictionary (01 Mar 1998) |
| pigment epithelium of eye | Epithelium in the retina, ciliary body, and iris containing pigment granules. (12 Dec 1998) |
| pineal eye | A non-image-forming, photoreceptive eye in or near the median line in certain crustacea and lower vertebrates; homologue of pineal gland in higher forms. Synonym: epiphysial eye, parietal eye. (05 Mar 2000) |
| watery eye | 1. <medicine> The watery eye; a disease in which the tears accumulate in the eye, and trickle over the cheek. 2. The emphatic repetition of a word or phrase, at the end of several sentences or stanzas. Origin: L, fr. Gr, fr. To bring to or upon; + to bring. Source: Websters Dictionary (01 Mar 1998) |
| web eye | <medicine> See Web. Source: Websters Dictionary (01 Mar 1998) Previous: Weber's syndrome, Weber's test for hearing, Weber's triangle, Weber, WilhelmNext: web eye, webfoot, webform, web of fingers/toes, webster, websteriteweb eye pterygium |
| moon-eye | 1. A eye affected by the moon; also, a disease in the eye of a horse. 2. <zoology> Any species of American fresh water fishes of the genus Hyodon, especially. H. Tergisus of the Great Lakes and adjacent waters. The cisco. Source: Websters Dictionary (01 Mar 1998) |
| white-eye | <zoology> Any one of several species of small Old World singing of the genus Zosterops, as Zosterops palpebrosus of India, and Z. Coerulescens of Australia. The eyes are encircled by a ring of white feathers, whence the name. Synonym: bush creeper, and white-eyed tit. Source: Websters Dictionary (01 Mar 1998) |
| compound eye | The eye of arthropods, most highly developed in insects and crustaceans; the eye consists of a group of functionally related visual elements (ommatidia) whose corneal surfaces collectively form a segment of a sphere. (05 Mar 2000) |
| plica semilunaris of eye | The semilunar fold formed by the palpebral conjunctiva at the medial angle of the eye, a fold of the conjunctival mucous membrane found in many animals; normally partially hidden in the medial canthus of the eye when at rest, it may be extended to cover part or all of the cornea in a winking-like action to clean the cornea, as in birds. Synonym: membrana nictitans, nictitating membrane, palpebra III, palpebra tertia, third eyelid. Synonym: plica lunata, plica semilunaris of eye, semilunar conjunctival fold. (05 Mar 2000) |
| posterior chamber of eye | The ringlike space, filled with aqueous humor, between the iris/pupil anteriorly and the lens and ciliary body posteriorly. Synonym: camera posterior bulbi, camera oculi minor, camera oculi posterior. (05 Mar 2000) |
| cross-eye | Alternative spelling for crossed eyes. (05 Mar 2000) |
| cyclopian eye | A congenital defect in which the two orbits merge to form a single cavity containing one eye, its origin evidenced by fusion of the right and left optic primordia, and in which the nose is absent; usually combined with cyclencephaly. Synonym: cyclopea, synophthalmia, synophthalmus. Origin: G. Kyklops, fr. Kyklos, circle, + ops, eye (05 Mar 2000) |
| hare's eye | lagophthalmos |
| harlequin eye | <radiology> Neurofibromatosis, dysplastic greater wing of sphenoid, plagiocephaly, focal calvarial expansion, subdural bleed, brain tumour (12 Dec 1998) |