CATARACT

n. Ka2t'a2r-a2kt. Gr., (caTapaVnj?, KaTappaVrqs (from icaTopaVop<u', to fall down). Lat., cataract a, catarrh act a, cataractes, catarrhactes. Ft., cataracte. Ger., Staar. It., cateratta. Sp., catarata. An opacity of the crystalline lens or its capsule, or both. [F.] Adherent c. Lat., cataract a accreta. Fr., cataracte adherente. Ger., angercachsener Staar. A c. that has formed adhesions to surrounding parts. [B, 108.] Anterior central (or polar) c. Lat., cataract a polar is anterior. Fr., cataracte centrale (ou polaire) anterieure. Ger., vorderer centraler Kapselstaar, vorderer Polarstaar. It., cateratta centrale (o polare) anteriore. Sp., catarata central (6 polar) anterior. An opacity of the central point or region of the anterior capsule -and of the anterior layers of the lens immediately beneath it. It may be congenital, but is frequently formed in early childhood as the result of a perforating ulcer of the cornea. A deposit of plastic lymph upon the centre of the capsule from the ulcer impairs the nutrition of the lens by disturbance of the osmosis, and as a result the endothelial cells of the capsule proliferate and the superficial layers of the lens become opaque. [F.] Arido-siliquose c. An over-mature c., perfectly dry and with a dense, wrinkled, calcareous capsule. [F.] Axial c. See Nuclear c. Barred c. Fr., cataracte barree. Ger., Balkenstaar. Syn.: trabecular flbrinous c. A spurious c. in which the pupil is angular and narrowed and has behind it a capsulolenticular c. in front of which there is a stripe or bar of lymph, of varying consistence, which runs acro the pupil. [Mackenzie (F).] Black c. Lat., cataract a nigra. Fr., cataracte noire. Ger., schwarzer Staar. It., cateratta nera. Sp.. catarata negra. 1. A nuclear c. very dark in color from the imbibition of haematin, and not infrequently complicated with inflammatory lesions of the deeper tunics of the eye and a fluid condition of the vitreous. 2. Formerly, amaurosis. [F.] Bursal capsulo-lenticular c. Lat., cataract a bursata. An obsolete term for a capsulo-lenticular c. a ociated with the presence, within the capsule, of a small cyst filled with purulent matter, generally situated behind the lens. [*F.] Calcareous c. Lat., cataract a cal care a. Fr., cataracte pierre use. A c. characterized by the deposit of carbonate and a little phosphate of calcium. [A. 301.] Capsular c. Lat., cataract a capsular is. Fr., cataracte capsulaire. Ger., Kapselstaar. It., cateratta capsulare. Sp., catarata capsular. An opacity of the lenticular capsule, partial or complete, without opacity of the lens E, he; E2, ell: G, go: I, die; I2, in; N, in: N2. tank; [s. 122]