Posters

Outcome of trans-epithelial photorefractive keratectomy (PRK) for extreme myopia with high speed excimer laser and advanced laser beam profile

Poster Details

First Author: F.Freiberg CANADA

Co Author(s):    D. Lin   S. Holland   M. Bizrah   S. Mosquera   S. Verma        

Abstract Details

Purpose:

To evaluate 12-month post-operative outcomes of extreme myopic eyes with transepithelial photorefractive keratectomy (TE-PRK) using SCHWIND AMARIS (SA) 1050 with an upgraded laser beam profile.

Setting:

Laser Eye Centre

Methods:

Retrospective case series. The outcomes of extreme myopic TE-PRK treatments performed with the SA1050 excimer laser with SmartSurfACE beam profile were evaluated at 12 months postoperatively. At completion of ablation Mitomycin C 0.02% applied. Refractive and visual comparisons of manifest refraction, uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), and safety (change of CDVA from baseline).

Results:

A total of 150 eyes with a mean pre-operative spherical equivalent refraction of -11.69±1.52D underwent SmartSurfACE PRK. The achieved treatment effect ranged from -10.1D to -16.9 D (mean -12.1D). 132 of 150 (88%) showed UDVA ≥20/40 post-operatively. 143 (150%) had no change or improved CDVA, 53 (35%) had improved CDVA 1 line or more, 9 (6%) gained 2 lines or more while 2 (1%) lost 2 lines or more. 4 eyes had visually significant haze. No retreatments performed.

Conclusions:

Trans-epithelial photorefractive keratectomy with Schwind Amaris SmartSurfACE excimer laser achieved good safety and efficacy in eyes with extreme myopia (≥ -10 D). 88% achieved ≥20/40 UDVA post-operatively. 95% no change or improved in CDVA and 6% gained 2 lines or more. TE-PRK with a high-speed excimer laser procedure may be a good option to consider for the correction of extreme myopia.

Financial Disclosure:

is employed by a for-profit company with an interest in the subject of the presentation, travel has been funded, fully or partially, by a company producing, developing or supplying the product or procedure presented