Programm                 "Degeneration und Regeneration– Grundlagen, Diagnostik und Therapie"


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Abstract
Abstract

Lamellar Keratotomy to Correct Astigmatism in Cataract Surgery

Wirbelauer C., Späth U., Böhm T., Häberle H., Pham D. T.
Dept. of Ophthalmology Klinik für Augenheilkunde, Vivantes Klinikum Neukölln, Berlin

Purpose: For the correction of astigmatism in cataract surgery several incisional procedures have been developed. In this study a modification of lamellar keratotomy was evaluated to correct astigmatism in cataract surgery.
Method: Prospectively 21 patients with a preoperative astigmatism of greater than 1.5 diopters (D) were studied. All patients were treated with a corneal incision and modified lamellar keratotomy in the steep meridian with an incision width of 6 mm and a radial length of 1.5 mm. Phacoemulsification and IOL implantation were performed through a 3.2 mm incision. After 4 weeks the mean astigmatism, the mean corneal power changes and the mean surgically-induced astigmatism derived from vector analysis in the central 3 mm optical zone were determined.
Results: The modified lamellar technique was also combined with a temporal or oblique approach. The mean astigmatism decreased from 2.74±0,81 D preoperatively to 1.52±1,11 D after 4 weeks (P=0,004). There were no significant changes (P=0,653) of the mean corneal power. The mean surgically-induced astigmatism was 2.70±1.38 D. In corneal topography most patients revealed a characteristic threefold pattern of the peripheral cornea.
Conclusions: The presented modified lamellar keratotomy effectively reduced high preoperative astigmatism in cataract surgery. The surgical approach can be combined


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