One year follow-up of transepithelial PRK vs transepithelial PRK combined with simultaneous high energy accelerated corneal cross-linking (TransPRK Xtra)

Session Details

Session Title: Surface Photoablation/PRK

Session Date/Time: Tuesday 25/09/2018 | 14:00-16:00

Paper Time: 15:38

Venue: Room A3, Podium 2

First Author: : J.Arbelaez OMAN

Co Author(s): :    M. Arbelaez                    

Abstract Details

Purpose:

To compare the refractive and visual outcomes and the induction of corneal higher order aberrations (HOA) in eyes, that underwent single step TransPRK versus TransPRK Xtra for Myopia / Astigmatism

Setting:

Muscat Eye Laser Center, Muscat, Sultanate of Oman.

Methods:

This retrospective study comprises two groups with in total 274 consecutive eyes of 141 patients. Group I contains 170 eyes treated with TransPRK and group II contains 104 eyes treated with TransPRK Xtra. All surgeries were performed using the Schwind Amaris 1050RS excimer laser using smart pulse technology and an aberration neutral profile centered at the corneal vertex with asymmetric offset. The simultaneous high energy accelerated corneal crosslinking (group II) was done using the KXL Avedro device. Only eyes targeted for emmetropia were included in the analysis. The preoperative metrics were correlated with the outcomes at 12-months postoperatively.

Results:

Groups I and II showed a mean SEQ of -0.06±0.14 D and -0.07±0.14D at the postoperative visit respectively. with 99% of the eyes within ±0.5D of the SEQ target in group I and 100% of the eyes within ±0.5D in group II. Significant improvement (p<0.05) on sphere, cylinder, SEQ, UDVA and CDVA in both groups. The CDVA improved in 44% and 54% of eyes respectively and 0% of eyes lost 2 or more lines of CDVA. Statistically significant correlation was observed in both groups between preoperative and postoperative corneal aberration values

Conclusions:

TransPRK and TransPRK Xtra using an aberration-free ablation profile yielded excellent visual outcomes. In both groups the preoperative sphere and astigmatism was reduced to subclinical values. Both groups are effective in terms of UDVA, CDVA, spherical and astigmatic correction, and preserving HOA. Both groups showed identical refractive results whereas the TransPRK Xtra group II showed on one hand a significant increased number of gained CDVA and on the other hand, an increased number of lost lines than the TransPRK group I. None of the eyes developed visually significant haze.

Financial Disclosure:

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