Posters

Topography-guided photorefractive keratectomy for irregular astigmatism after radial keratotomy using a high-speed laser

Poster Details

First Author: F.Freiberg CANADA

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

Abstract Details

Purpose:

To evaluate Topography-guided Photorefractive Keratectomy (TG-PRK) for Irregular astigmatism after Radial Keratotomy (RK) with Schwind Amaris 1050 (SA).

Setting:

Laser Eye Centre

Methods:

Retrospective case series of 33 RK eyes treated with Schwind Amaris 1050 excimer laser with CXL with Athens protocol. Preoperative and post-operative uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), manifest refraction (MR) and topographic cylinder were analyzed after 12 months of follow-up.

Results:

33 had sufficient data at 12 months for analysis. 19 of 33 (58%) showed UDVA ≥20/40 post-operatively. 17 (52%) had improved CDVA and 9 (27%) gained 2 lines or more while 1 (3%) lost 2 lines or more. Mean astigmatism was reduced from 2.11±1.78D to 0.96±1.10D. Mean spherical equivalent was improved from 2.46±1.98 to -0.45±2.23D.

Conclusions:

Early results of TG-PRK CXL with Schwind Amaris 1050 show efficacy and safety in treating post-RK irregular astigmatism. More than a half (58%) had UDVA ≥20/40 at one year and more than a quarter (27%) had CDVA improved 2 lines or more. The technique maybe an alternative treatment for post-RK with contact lens intolerance.

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