[Effect of incision form and tunnel length on induced astigmatism with the no-stitch technique].
The frown incision with horizontal suture can induce minimal astigmatism. This method is also currently used with the no-stitch technique. We assess whether it is better than other incisions. Two prospective studies were conducted, altogether including 95 operations in 95 patients. Entry criterion was preoperative astigmatism < 0.75 D. Astigmatism was assessed at 1 week and 4 weeks postoperatively. First study: induced astigmatism with three incision types--frown (A), horizontal arc (B) and limbus-based (C). Second study: induced astigmatism with trapezoid incision--2-mm or 4-mm tunnel. The induced astigmatism did not differ significantly in the three incision types: A 0.82, B 0.67, C 0.8 D. Using the trapezoid incision with 2-mm and 4-mm tunnel the induced astigmatism was 0.3 and 0.38 D, respectively. This difference was also not significant. Thus, neither incision type nor preparation of a longer tunnel has any influence on postoperative induced astigmatism.
Wollensak
J
J
Augenklinik, Klinikum Rudolf Virchow der Freien Universität Berlin.
Pham
D T
DT
Seiler
T
T
D001251:Astigmatism / Q000209:etiology*; D002387:Cataract Extraction / Q000379:methods*; D005500:Follow-Up Studies; D006801:Humans; D011183:Postoperative Complications / Q000209:etiology*; D011446:Prospective Studies; D013536:Suture Techniques
Der Einfluss von Inzisionsform und Tunnellänge auf den induzierten Astigmatismus bei der No-stitch-Technik.