| bull's-eye maculopathy | An ocular condition in which oedema or degeneration of the sensory retina at the posterior pole of the eye causes alternating areas of light and dark, as in a target; seen in toxic, inflammatory, and hereditary conditions. (05 Mar 2000) |
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| maculopathy | Any pathological condition of the macula lutea. Synonym: macular retinopathy. (05 Mar 2000) |
| cystoid maculopathy | Cystic degeneration of the central retina that may occur after cataract extraction, in senile macular degeneration, and in other retinal abnormalities. (05 Mar 2000) |
| solar maculopathy | Damage to the fovea centralis of the retina and the adjacent choroid due to the thermal action of infrared rays, consequent to sungazing or watching a solar eclipse without sufficient eye protection. See: photoretinopathy. Synonym: eclipse blindness, solar blindness. (05 Mar 2000) |
| nicotinic acid maculopathy | Maculopathy observed in persons taking 3000 mg or more of nicotinic acid daily; normal vision returns after this medication is discontinued. (05 Mar 2000) |
| familial pseudoinflammatory maculopathy | Familial macular degeneration resembling inflammatory changes. (05 Mar 2000) |
| ARC | A stage before AIDS, with symptoms such as swollen lymph glands, long-lasting night sweats, fevers and unusual weight loss. Also commonly called symptomatic HIV infection. This term is no longer officially recognised by the CDC. (09 Oct 1997) |
| arc-flash conjunctivitis | Acute keratoconjunctivitis resulting from exposure to intense ultraviolet irradiation. Synonym: actinic conjunctivitis, arc-flash conjunctivitis, flash keratoconjunctivitis, ophthalmia nivalis, snow conjunctivitis, welder's conjunctivitis. (05 Mar 2000) |
| arc of buehler | <radiology> Persistent embryologic anastomosis between coeliac artery and superior mesenteric artery (12 Dec 1998) |
| arc of riolan | <radiology> Inconstant anastomotic artery between middle and left colic aa. (12 Dec 1998) |
| arc perimeter | A perimeter consisting of a saemicircular frame at the centre of which the patient looks while a white object is moving along the arc, the exact point where it becomes visible or invisible being noted and recorded on a chart. (05 Mar 2000) |
| auricular arc | A line carried over the cranium from the centre of one external auditory meatus to that of the other. Synonym: interauricular arc. (05 Mar 2000) |
| bois d'arc | <botany> The Osage orange (Maclura aurantiaca). "The bois d'arc seems to be the characteristic growth of the black prairies." (U. S. Census (1880)) Origin: F, bow wood. So called because used for bows by the Western Indians. Source: Websters Dictionary (01 Mar 1998) |
| bregmatolambdoid arc | The line running along the sagittal suture from the bregma to the apex of the lambdoid suture. (05 Mar 2000) |
| reflex arc | The route followed by nerve impulses in the production of a reflex act, from the peripheral receptor organ through the afferent nerve to the central nervous system synapse and then through the efferent nerve to the effector organ. (05 Mar 2000) |