| CRAD | central retinal artery occlusion |
|---|---|
| CRAO | central retinal artery occlusion |
| CRB | chemical, radiological, and biological; congenital retinal blindness |
| CRD | carbohydrate-recognition domain; chronic renal disease; chronic respiratory disease; child restraint... |
| CRP | chronic relapsing pancreatitis; corneal-retinal potential; coronary rehabilitation program; C-reacti... |
| pigmented retinal epithelium | Layer of unusual phagocytic epithelial cells lying below the photoreceptors of the vertebrate eye. The dorsal surface of the PRE cell is closely apposed to the ends of the rods and as discs are shed from the rod outer segment they are internalised and digested by the PRE. Do not have desmosomes or cytokeratins in some species. (18 Nov 1997) |
|---|---|
| trans-retinal | The orange retinaldehyde resulting from the action of light on the rhodopsin of the retina, which converts the 11-cis-retinal component of the rhodopsin to all-trans-retinal plus opsin. Synonym: trans-retinal, visual yellow. (05 Mar 2000) |
| exudative retinal detachment | Detachment of the retina without retinal breaks, arising from inflammatory disease of choroid, retinal tumours, and retinal angiomatosis. (05 Mar 2000) |
| falciform retinal fold | A congenital fold from the disk to the ciliary region in the inferior temporal quadrant of the retina. (05 Mar 2000) |
| unequal retinal image | A condition in which the ocular image of an object as seen by one eye differs in size and shape from that seen by the other. (12 Dec 1998) |
| 11-cis-retinal | The isomer of retinaldehyde that can combine with opsin to form rhodopsin; it is formed from 11-trans-retinal by retinal isomerase. Synonym: neoretinal b. (05 Mar 2000) |
| acute reflex bone atrophy | Atrophy of bones, commonly of the carpal or tarsal bones, following a slight injury such as a sprain. See: causalgia, reflex sympathetic dystrophy. Synonym: acute reflex bone atrophy, posttraumatic osteoporosis, Sudeck's syndrome. Origin: L. English sweat (05 Mar 2000) |
| acute yellow atrophy of the liver | A lesion in which there is extensive and rapid death of parenchymal cells of the liver, sometimes with fatty degeneration of the size of the organ; the necrosis may result from fulminant viral infection or chemical poisoning; associated with jaundice. Synonym: acute parenchymatous hepatitis, Rokitansky's disease. (05 Mar 2000) |
| alveolar atrophy | Diminution in size of the supportive tissues of the teeth due to lack of function, reduced blood supply, or unknown causes. (05 Mar 2000) |
| arthritic atrophy | Atrophy of muscles rendered inactive by a chronically inflamed or fixed joint. (05 Mar 2000) |
| atrophy | <pathology> A wasting away, a diminution in the size of a cell, tissue, organ or part. Origin: L., Gr. Atrophia (16 Dec 1997) |
| back-pressure renal atrophy | <radiology> Caliectasis without obstruction, due to repeated episodes of obstruction, gradual loss of renal pyramids (12 Dec 1998) |
| blue atrophy | Depressed blue atrophic scars due to injections in the skin of impure substances, as seen in narcotics addicts. (05 Mar 2000) |
| brown atrophy | Atrophy of the heart wall, especially in the elderly, in which the muscle is dark reddish brown and reduced in volume; the muscle fibres become pigmented especially about the nuclei, by lipochrome granules. (05 Mar 2000) |
| Buchwald's atrophy | A progressive form of cutaneous atrophy. (05 Mar 2000) |