A System of Operative Surgery, Volume 4 (of 4)

by Unknown

4. Astigmatism produced by the incision is corrected with glasses. This astigmatism is very marked, often amounting to six or eight diopters or more.

IRIDECTOMY FOR SMALL GROWTHS OF THE IRIS

Indications. This is performed—

(i)	As a diagnostic measure.
(ii)	As a curative measure.

In the latter instance it is obvious that the growth must be very small and situated at the free margin of the iris to yield a satisfactory result, especially if it be of a malignant character.

Operation. The operation is performed under cocaine, eserine having been previously instilled in order to contract the pupil.

First step. An incision should be made with a narrow Graefe’s knife in the limbus in a position most suitable for removing the growth. The incision should be as large as possible so as to avoid wiping off any portions of the growth into the anterior chamber.

Second step. The iris should be seized well in the periphery so as to avoid breaking up the growth; it is then withdrawn with the growth, and the latter removed.

IRIDECTOMY FOR PROLAPSE OF THE IRIS

This operation is usually performed for prolapse of the iris following a wound of the cornea or limbus, and may be attempted up to about the third day after the original injury.