[Wedge resection, corrective treatment of giant corneal astigmatism]

This study divides major astigmatism into 2 groups for which the authors advocate a new type of wedge resection. Group I includes 18 patients with astigmatism occurring as a complication of penetrating keratoplasty. Group II includes 10 patients with astigmatism due to circumscribed peripheral limbal corneal dystrophy. Wedge resection over a 180 degrees corneal arc resulted in a significant reduction of preoperative astigmatism and an improvement of visual acuity. Use of a photokeratoanalysor could permit better prediction of the expected effect of wedge resection. This instrument provides measurements of all corneal parameters necessary for determining whether surgery should be performed and which technique to use.