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Surgically induced astigmatism following a 4.0 mm sclerocorneal valve incision.

Abstract：

PURPOSE:To determine whether sutureless small incision cataract surgery reduces induced astigmatism over the long term. SETTING:University Eye Hospital, Vienna, Austria. METHODS:In a prospective study, we investigated surgically induced astigmatism in 63 cases of no-stitch, small incision cataract surgery with a 4.0 mm square sclerocorneal tunnel and implantation of a flexible intraocular lens. Follow-up was 4 to 5 years. Keratometry was measured with a Zeiss keratometer preoperatively and after 1 day, 1 week, 1, 3, and 9 months, and a median of 4.4 years. In 21 nonoperated eyes, we investigated the natural course of astigmatism over 5 years. RESULTS:The mean keratometric cylinder stabilized at 0.8 diopter (D) after 1 week and slightly decreased to 1.0 D after 4 to 5 years. Cravy's vector analysis showed an immediate against-the-rule (ATR) shift of -0.2 D that remained relatively stable until 9 months. Between 9 months and 4.4 years postoperatively, there was a statistically significant increase in ATR induced astigmatism from -0.2 to -0.5 D. The natural course of astigmatism in the nonoperated eyes showed an ATR shift of -0.1 D for the same period. CONCLUSION:The result show a small, though statistically significant amount of postoperatively induced astigmatism 4 to 5 years after no-stitch, small incision cataract surgery.

journal_name

J Cataract Refract Surg

journal_title

Journal of cataract and refractive surgery

authors

Rainer G,Menapace R,Vass C,Strenn K,Papapanos P

doi

10.1016/s0886-3350(97)80180-0

subject

Has Abstract

pub_date

1997-04-01 00:00:00

pages

358-64

issue

3

eissn

0886-3350

issn

1873-4502

pii

S0886-3350(97)80180-0

journal_volume

23

pub_type

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