One year outcomes of LASIK for mixed cylinder using the MEL 90 excimer laser
Session Details
Session Title: Presented Poster Session: Keratorefractive Results I
Venue: Poster Village: Pod 2
First Author: : A.Day UK
Co Author(s): : D. Reinstein G. Carp T. Archer
Abstract Details
Purpose:
To report the outcomes of LASIK for mixed cylinder using the Triple-A ablation profile with the MEL 90 excimer laser (Carl Zeiss Meditec).
Setting:
London Vision Clinic, London, UK.
Methods:
This was a retrospective analysis of 105 consecutive eyes (82 patients) treated by LASIK for mixed cylinder using Triple-A ablation profile with the MEL 90. Patients were followed for 1 year after surgery. Standard outcomes analysis and vector analysis by the Alpins method was performed.
Results:
Mean attempted SEQ was 0.30±0.90D (-2.30 to +1.75D). Mean cylinder was 2.93±1.47D (0.75 to 7.00D). Preop CDVA was 20/20 or better in 81% of eyes. Postop UDVA was 20/20 or better in 69% and 20/25 or better in 86% of eyes. Mean postop SEQ relative to the intended target was -0.21±0.38D (-1.25 to +1.13D), with 83% within ±0.50D. Mean postop cylinder was 0.57±0.41D (0.00 to 1.75D). For angle of error, the arithmetic mean was -0.6±4.2˚, the absolute mean was 2.9±3.0˚. Three percent eyes lost 1 line CDVA, no eyes lost ≥2 lines CDVA.
Conclusions:
One year outcomes of LASIK using the MEL 90 for mixed cylinder up to 7.00D demonstrated excellent efficacy, safety, and predictability. Vector analysis found a 12% overcorrection in magnitude. Given the high accuracy for angle of error, a nomogram could be applied to reduce the overcorrection.
Financial Disclosure:
receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented, travel has been funded, fully or partially, by a company producing, developing or supplying the product or procedure presented
