Changes in astigmatism after surgery for congenital ptosis.

To determine the effect of ptosis surgery on the astigmatic refractive error in pediatric patients, we assessed 88 eyes postoperatively at 3, 6, and 12 months. Thirty-six eyes of unilateral cases were used as controls. There was an overall increase in average astigmatic refractive error of the study group by 0.30 diopters, while the control group decreased 0.15 D. Thirty-six percent of study eyes changed by more than 0.75 D. Results were similar for both fascia lata slings and levator resections. Those patients older than 4 years showed an increase in average cylinder (0.50 D), while those younger than 4 years decreased their average cylinder (0.20 D). Careful monitoring with postoperative refractions is required in pediatric ptosis patients.