Text-book of ophthalmology . Fig. 454. Fig. 455. Fig. 454.—Flap Extraction with Iridectomy. Magnified 2X1- <S Si, scleral section, con-centric with the limbus. ai a, edges of the sphincter. Fig. 455.—Flap Extraction without Iridectomy. Magnified 2X1. S Si, corneal section,which everywhere lies in the limbus. The pupil is greatly contracted by means of eserine. As a con-sequence of this marked miosis, the pupil is not perfectly circular, but somewhat irregular, and thefringe of pigment lining it has become broader. operation when so made modified simple extraction. Chandler pointsout that th
Text-book of ophthalmology . Fig. 454. Fig. 455. Fig. 454.—Flap Extraction with Iridectomy. Magnified 2X1- <S Si, scleral section, con-centric with the limbus. ai a, edges of the sphincter. Fig. 455.—Flap Extraction without Iridectomy. Magnified 2X1. S Si, corneal section,which everywhere lies in the limbus. The pupil is greatly contracted by means of eserine. As a con-sequence of this marked miosis, the pupil is not perfectly circular, but somewhat irregular, and thefringe of pigment lining it has become broader. operation when so made modified simple extraction. Chandler pointsout that the retained cortical lens matter can be expelled through the holethus made.—D.] The omission of iridectomy has the advantage of keeping the patients pupilround and mobile, but it also entails many disadvantages, which limit the number of casesin which extraction without iridectom} is indicated. Thus: 1. The delivery of thelens is more difficult without iridectomy, because the lens has to be expelled through thenarrow pu
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