The practice of surgery . were painful, butno inflammation followed of any consequence ; in a few days new andhealthy epithelium was reproduced, without any return of opacity, andvision was very much improved ; in one eye, in fact, the sight Avas sogood, that the smallest pearl type could be read with it. The opacity consisted of salts of lime and magnesia, principallyphosphates.—Op. cit. pp. 117-121.—Ed.] In advanced years, and sometimes even in the comparatively youngadult, the corneal periphery gradually becomes opaque, and of a graycolor. The affection is termed Arcus senilis ; a mere defo
The practice of surgery . were painful, butno inflammation followed of any consequence ; in a few days new andhealthy epithelium was reproduced, without any return of opacity, andvision was very much improved ; in one eye, in fact, the sight Avas sogood, that the smallest pearl type could be read with it. The opacity consisted of salts of lime and magnesia, principallyphosphates.—Op. cit. pp. 117-121.—Ed.] In advanced years, and sometimes even in the comparatively youngadult, the corneal periphery gradually becomes opaque, and of a graycolor. The affection is termed Arcus senilis ; a mere deformity ; andnot amenable to remedial treatment. [This circumferential opacity has been demonstrated by Mr. Canton,to depend upon a fatty degeneration of the margin of the cornea. Itfrequently coincides with the same abnormal condition of other organs,as of the heart.—Ed.] Staphyloma of the Cornea. Staphyloma of the cornea is an opaque projection of a part, or ofthe whole of this membrane. 1 Lancet, No. 1010, p. 128 STAPHYLOMA OF THE CORNEA. Partial staphyloma is usually situated at the lower or lateral part ofthe cornea. The iris is adherent to the whole inner surface of the pro-jection, and, consequently, the anterior cham-Fig- 35. ber is much diminished in size; generally, the pupil itself is more or less involved, and visionrendered very imperfect. The affection iscaused by an ulcer penetrating the cornea, andallowing the iris to become prolapsed throughthe opening. When a considerable portion ofthe iris has protruded, it does not shrink whenthe inflammation subsides, but remains, andstaphyloma.^* forms a. projection at that part of the cornea. After a time, the exposed projection of the irisis covered by an opaque firm tissue, of the nature of cicatrix, the edgesof which become incorporated at the base with the sound cornea. Itis generally the consequence of strumous, catarrhal, or purulent oph-thalmia. Total staphyloma is formed exactly in the same way ; it diff
Size: 1788px × 1397px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdec, booksubjectsurgicalproceduresoperative
