Comparison of clinical outcomes after laser in situ keratomileusis with the use of Intralase femtosecond laser and Visumax femtosecond laser

Poster Details

First Author: A.Chew SINGAPORE

Co Author(s):    A. Petznick   L. Tong   R. Hall   D. Tan   J. Mehta  

Abstract Details

Purpose:

To evaluate the clinical outcomes of laser in situ keratomileusis (LASIK) with the use of Intralase femtosecond laser and Visumax femtosecond laser.

Setting:

Singapore National Eye Centre

Methods:

In a prospective, contralateral paired eye clinical trial, eyes of 43 patients were randomized to flap creation by IntraLase (Group A) or VisuMax (Group B) femtosecond laser. Visual acuity, Schirmer’s test, tear break up time (TBUT), fluorescein corneal staining and corneal sensitivity were assessed pre-operatively and post-operatively at 1 week, 1 month and 3 months after LASIK. The clinical parameters were compared pre and post-operatively, and between the 2 groups.

Results:

The uncorrected visual acuity improved significantly in both groups post-operatively and there was no difference between the 2 groups. TBUT did not show significant difference post-operatively and when compared between the 2 groups. Tear production was significantly decreased at post-operative 1 week (p<0.03) but not at 1 month (p=1.00) and 3 month (p=0.89); there was no difference in tear production between the 2 groups. Corneal staining was significantly increased at post-operative 1 week (p<0.001) but not at 1 month (p=0.15) and 3 months (p=0.07); there was no difference in the amount of corneal staining between the 2 groups. Corneal sensitivity was significantly reduced at post-operative 1 week (p<0.001), 1month (p<0.001) and at 3 months (p<0.001) postoperatively; there was no difference in the corneal sensitivity between the 2 groups.

Conclusions:

Following Intralase and Visumax femtosecond LASIK, uncorrected visual acuity improved. Tear production decreased with an increased in corneal staining in the immediate post-operative period, and returned to baseline at post-operative 1 month. There was also a reduction in corneal sensitivity post-operatively, and showed partial recovery at post-operative 3 month. There were no statistical differences in the clinical outcomes between Intralase and Visumax femtosecond LASIK. FINANCIAL DISCLOSURE?: ... receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented