Comparison of outcomes following SMILE in patients with small and large angle kappa

Session Details

Session Title: Small Lenticule Extraction I

Session Date/Time: Sunday 15/09/2019 | 08:00-10:00

Paper Time: 08:18

Venue: Free Paper Forum: Podium 1

First Author: : R.Arra INDIA

Co Author(s): :    S. Ganesh   S. Brar                          

Abstract Details

Purpose:

To assess treatment zone centration, visual outcomes and optical quality between patients having small and large angle kappa following SMILE for myopia and myopic astigmatism

Setting:

Nethradhama super specialty Eye hospital, Bengaluru

Methods:

Eligible patients undergoing SMILE for myopia and myopic astigmatism were included and categorized into two groups, small angle kappa (<5) and large angle kappa (>5). Uncorrected(UCVA) and best-corrected Visual acuity(BCVA), refraction and optical quality (using double pass system) were assessed pre-operatively, 1st postoperative day (POD) and at 7th POD. Lenticule centration was assessed at 7th POD (to avoid epithelial changes) using the pachymetric difference map available from pentacam considering the point of maximum pachymetric difference(PPMD) which corresponds to center of extracted lenticule and maximum refractive power correction.

Results:

100 eyes of 68 patients with a mean age of 26.81±1.89 years were studied. The mean angle kappa was 3.36 ± 0.86 and 6.88 ± 0.55 in small and large angle kappa groups (p<0.05) respectively. Both the groups were matched in terms of spherical equivalent, refraction, OSI (objective scatter index). PPMD was significantly deviated in the large angle kappa group compared to the small angle kappa group (p<0.05). Both groups were comparable in terms of UCVA, BCVA, refraction, and OSI.

Conclusions:

In SMILE, although the treatment zone was significantly decentred in patients with large angle kappa group compared to small angle kappa group, there was no significant difference in visual results between both groups thereby signifying the importance of active patient controlled fixation on the visual axis to provide favorable outcomes in the post-op period.

Financial Disclosure:

travel has been funded, fully or partially, by a company producing, developing or supplying the product or procedure presented