| RIS | radiology information system; rapid immunofluorescence staining; resonance ionization spectroscopy |
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| RMA | rapid membrane assay; refuses medical advice; Registered Medical Assistant; relative medullary area;... |
| RME | rapid maxillary expansion; resting metabolic expenditure; right mediolateral episiotomy |
| RMM | rapid micromedia method |
| RP | radial pulse; radiopharmaceutical; rapid processing [of film]; Raynaud phenomenon; reactive protein;... |
| 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) |
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| 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) |
| schematic eye | The representation of the optical system of an ideal normal eye in which are listed the curvatures and indices of refraction of the refracting elements and their intervening distances. (05 Mar 2000) |
| scotopic eye | An eye that has been in darkness or semidarkness and has undergone regeneration of rhodopsin (visual purple), which renders it more sensitive to reduced illumination. Synonym: scotopic eye. (05 Mar 2000) |
| squinting eye | The eye, in cases of strabismus, that is not directed toward the object of regard. (05 Mar 2000) |
| near point of the eye | <ophthalmology> The nearest point to the entrance of the pupil of the normal eye at which focus is attained without strain, 10 inches (250 mm) is the generally accepted distance. In very young people and in those with myopia, this distance is less. The near point recedes with age, possibly even causing farsighted condition,. (05 Aug 1998) |
| substance of lens of eye | That which constitutes the lens of the eye, composed of a nucleus and a cortex and covered by an epithelium. Synonym: substantia lentis. (05 Mar 2000) |
| nose-eye reflex | Contraction of the orbicularis oculi muscles upon tapping the margin of the orbit, or the bridge or tip of the nose. Synonym: nose-bridge-lid reflex, nose-eye reflex. (05 Mar 2000) |
| dark-adapted eye | An eye that has been in darkness or semidarkness and has undergone regeneration of rhodopsin (visual purple), which renders it more sensitive to reduced illumination. Synonym: scotopic eye. (05 Mar 2000) |
| dead-eye | A round, flattish, wooden block, encircled by a rope, or an iron band, and pierced with three holes to receive the lanyard; used to extend the shrouds and stays, and for other purposes. Synonym: deadman's eye. Source: Websters Dictionary (01 Mar 1998) |