This article is more than 5 years old. Information may no longer be current.
Femtosecond lenticule extraction corrects myopic astigmatism
Click Here to Manage Email Alerts
Femtosecond refractive lenticule extraction corrected myopic astigmatism, but there was a slight trend toward astigmatic undercorrection over time, a study found.
The retrospective study included 182 eyes of 113 patients who underwent the ReLEx flex procedure with the VisuMax femtosecond laser (Carl Zeiss Meditec).
Visual and refractive outcomes were assessed at 1 week and 1, 3 and 6 months postoperatively. Investigators performed a vector analysis of astigmatic outcomes.
At 6 months, astigmatism was 0.25 D or less in 103 eyes (56.6%), 0.25 D to 0.5 D in 43 eyes (23.6%), 0.5 D to 0.75 D in 18 eyes (9.9%) and 0.75 D to 1 D in six eyes (3.3%). Astigmatism was 1 D or greater in 12 eyes (6.5%).
Undercorrection was 4% at 1 week, 11% at 1 month, 9% at 3 months and 12% at 6 months. Undercorrection appeared to develop up to 1 month.
The residuum, a measure of astigmatic accuracy, was 0.42 D at 1 week, 0.39 D at 1 month, 0.36 D at 3 months and 0.43 D at 6 months.
Corrected distance visual acuity was 20/20 or better in 96% of eyes, and no eyes had corrected distance visual acuity worse than 20/32. Uncorrected distance visual acuity was 20/20 or better in 75% of eyes, and no eyes had uncorrected distance visual acuity worse than 20/50, the authors said.
Click Here to Manage Email Alerts