Posters

Comparison of refractive and clinical outcomes after wavefront-guided LASIK between WaveScan and iDesign aberrometers

Poster Details

First Author: C.Chin Sun TAIWAN

Co Author(s):    Y. Lin                    

Abstract Details

Purpose:

To evaluate the refractive, clinical and aberrometric outcomes after myopic LASIK surgery using the WaveScan or iDesign aberrometers.

Setting:

Laser Vision Correction Center, Chang Gung Memorial Hospital, Keelung, Taiwan

Methods:

This retrospective, non-randomized study included patients underwent either WaveScan-guided or iDesign-guided LASIK surgery. Perioperative evaluations included manifest and cycloplegic refraction, corneal topography, ocular aberrometry, contrast sensitivity and dry eye-related parameters. Patients were examined the day after surgery, 1 week and 1, 3, and 6 months after surgery.

Results:

A total of 71 eyes from 37 patients were included in the study. Fourty-one eyes received WaveScan-guided LASIK and the other 30 eyes received iDesign-guided LASIK surgery. The preoperative demographics of the patients and refractive characteristics of the eyes were not significantly different except for cylinder power. Six-month postoperatively, the iDesign group showed better uncorrected distance visual acuity (UDVA) and excellent predictability. In the WaveScan group, 3 eyes (7.3%) lost best corrected visual acuity (BCVA); however, no eye lost BCVA in the iDesign group. All dry eye-related parameters were not statistically different between the groups except for Schirmer test value. Eyes in the iDesign group showed better contrast sensitivity values than correspondingly preoperative values at almost all spatial frequencies in both dim light and bright light conditions after surgery while eyes in the WaveScan group remain unchanged. Increased high order aberrations (HOAs), especially primary coma RMS, were noted in both groups six-month after surgery. However, decreased spherical aberration (SA) was noted in the iDesign group, though not reaching statistical significance.

Conclusions:

The use of iDesign-guided LASIK surgery resulted in better refractive outcomes, predictability, safety and contrast sensitivity compared to Wavescan.

Financial Disclosure:

NONE