Peripheral corneal relaxing incisions combined with XXXX surgery.

@entity940 @entity1 @entity231
PURPOSE: To analyze the effectiveness of peripheral corneal relaxing incisions (PCRIs) in correcting corneal @entity940 during @entity231 surgery. SETTING: Cullen Eye Institute, Baylor College of Medicine, Houston, Texas, USA. METHODS: In 115 eyes of 94 @entity1 (mean age 69 years +/- 12 [SD]), @entity231 surgery was combined with PCRIs. The PCRIs were created according to a nomogram based on age and preoperative keratometric @entity940 . Postoperative keratometric @entity940 was measured at 1 day and 1 and 4 months. Vector analyses using the Holladay-Cravy-Koch formula and Alpins method were performed. RESULTS: The PCRIs significantly decreased keratometric @entity940 in @entity1 with preexisting with-the rule (WTR) or against-the-rule (ATR) @entity940 and increased the percentage of the eyes with lower keratometric @entity940 in each group. Four months postoperatively in @entity1 with WTR @entity940 , single and paired 6.0 mm PCRIs induced mean with-the-wound minus against-the-wound changes (WTW-ATW) of -0.55 diopter (D) and -1.18 D, respectively. In eyes with ATR @entity940 , the mean WTW-ATW changes induced by single 4.5 mm, single 6.0 mm, and paired 6.0 mm PCRIs were -2.18 D, -2.02 D, and -2.72 D, respectively. These mean WTW-ATW changes did not significantly regress from 1 day to 4 months postoperatively. CONCLUSIONS: Peripheral corneal relaxing incisions were effective in reducing preexisting @entity940 during @entity231 surgery. A modified nomogram is proposed. The long-term effect of PCRIs should be evaluated.
