[Cataract surgery in narrow pupil and postoperative fibrin reaction, especially after sphincterectomy]

Since increased intraoperative iris irritation can lead to increased postoperative inflammation, we are interested in postoperative reactions to several varied surgical procedures. We performed pupil stretching, iridotomy with iris suture, and partial sphincterectomy.

From January 1995 to January 1996, 100 patients (103 eyes) with narrow pupils underwent cataract surgery. In 13 eyes a iridotomy and iris suture were performed, in 28 eyes a partial sphincterectomy. In 62 eyes there was no surgical intervention after pupil stretching. Postoperative examinations were carried out in the early postoperative phase (up to 5 days postoperative) as well as 4 weeks after surgery. Fibrin reaction was classified according to 3 grades, (1) faint fibrinous threads, (II) fibrinous net, and (III) membranous fibrin exsudation.

In the group without additional surgery there was a fibrinous reaction of grade I and II in 11 eyes. This complication occurred after iridotomy and iris suture in four cases and after sphincterectomy in four cases. While the intensity of fibrinous reaction was comparable in the first two groups, the fibrinous reaction after sphincterectomy was more intensive in one eye (grade III). However, response to intensive local antiphlogistic therapy was good. Frequency of fibrinous reaction in the three groups was statistically not significant. It should be pointed out that there was a partial restoration of pupil movements through sphincterectomy: mean pupil diameter was 4 mm, and 2.5 mm under exposure to light. Three patients had no pupillary reaction at all.

Partial sphincterectomy facilities intraoperative manipulations of cataract surgery. Postoperative inflammatory reaction is rare and was very responsive to medical treatment. The reconstruction of pupillary movement is part of full visual function and, last but not least a round pupil is aesthetically more desirable.