| hemianopsia | <neurology, ophthalmology> Blindness for half the field of vision in one or both eyes. Origin: Gr. Opsis = vision (09 Mar 1998) |
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| partial face-sparing lipodystrophy | A syndrome beginning at puberty that resembles total lipodystrophy but is inherited as an autosomal or X-linked dominant form. (05 Mar 2000) |
| potassium sparing diuretics | Diuretic agents that, unlike most diuretics, retain potassium; examples are triamterene and amiloride. Often used together with diuretics that promote the loss of both sodium and potassium. Used in hypertension and in congestive heart failure. (05 Mar 2000) |
| sparing action | The manner in which a nonessential nutritive component, by its presence in the diet, lowers the dietary requirement for an essential component; thus, nonessential l-cysteine spares essential l-methionine and nonessential l-tyrosine spares essential l-phenylalanine. Synonym: sparing phenomenon. (05 Mar 2000) |
| sparing phenomenon | The manner in which a nonessential nutritive component, by its presence in the diet, lowers the dietary requirement for an essential component; thus, nonessential l-cysteine spares essential l-methionine and nonessential l-tyrosine spares essential l-phenylalanine. Synonym: sparing phenomenon. (05 Mar 2000) |
| homonymous | 1. Having the same name or designation; standing in the same relation; opposed to heteronymous. 2. Having the same name or designation, but different meaning or relation; hence, equivocal; ambiguous. Origin: L. Homonymus, Gr.; the same +, for name; akin to E. Name. Source: Websters Dictionary (01 Mar 1998) |
| homonymous diplopia | Double image's produced by stimuli arising from points proximal to the horopter. Synonym: homonymous diplopia, simple diplopia, uncrossed diplopia. (05 Mar 2000) |
| homonymous hemianopia | Blindness in the corresponding (right or left) field of vision of each eye. (05 Mar 2000) |
| homonymous images | Double image's produced by stimuli arising from points proximal to the horopter. Synonym: homonymous diplopia, simple diplopia, uncrossed diplopia. (05 Mar 2000) |
| homonymous parallax | The apparent movement of an object toward the open eye when one is closed; noted in oesophoria. (05 Mar 2000) |
| age-related macular degeneration | A common macular degeneration beginning with drusen of the macula and pigment disruption and sometimes leading to severe loss of central vision. (05 Mar 2000) |
| macular | Maculate 1. Relating to or marked by macules. 2. Denoting the central retina, especially the macula retinae. (05 Mar 2000) |
| macular amyloidosis | A localised form of amyloidosis cutis characterised by pruritic symmetrical brown reticulated macules, especially on the upper back; microscopically, amyloid is deposited as small subepidermal globules. (05 Mar 2000) |
| macular area | An oval area of the sensory retina, 3 by 5 mm, temporal to the optic disk corresponding to the posterior pole of the eye; at its centre is the central fovea, which contains only retinal cones. Synonym: area centralis, macula lutea, macular area, punctum luteum, Soemmerring's spot, yellow spot. (05 Mar 2000) |
| macular arteries | See: inferior macular arteriole, superior macular arteriole. (05 Mar 2000) |