Posters

Astigmatic outcomes in femtosecond astigmatic keratotomy vs photorefractive keratectomy

Poster Details

First Author: H.Khakshour IRAN

Co Author(s):    A. Vejdani   K. Taghizadeh   H. Mohammadnejhad   L. Saffarian   H. Ghooshkhanei        

Abstract Details

Purpose:

To describe and compare postoperative astigmatic changes after femtosecond laser intrastromal astigmatic keratotomy (AK) and Photorefractive keratectomy (PRK) in eyes with moderate to high astigmatism error

Setting:

Naviddidegan Eye Clinic, Mashhad, Iran

Methods:

This study comprised patients having PRK or AK surgeries for astigmatism correction. All eyes had less than 6 diopter (D) preoperative cylinder and were analyzed at 3 months of follow up. One surgeon performed all procedures. Paired incisions were placed symmetrically on steepest corneal meridian according to Orb Scan results

Results:

forty- eight eyes (27 patients) were included. The mean manifest astigmatism decreased from -4.41± 1.73 D preoperatively to -2.33 ±1.12 D postoperatively in AK group (p<0.001) and in PRK group, it decreased from -3.10 ± 1.22 D to -1.07 ± 0.59 D postoperatively (p<0.001). The maximum amount of astigmatic correction after AK and PRK surgeries was 4.5 D. 23.8%, 4.8% and 71.4% of eyes in AK group had 0.5 D or less, 1 D or less or greater than 1 D astigmatism correction, respectively, compared with 29.6%, 70.4% 1 D or less or greater than 1 D correction after PRK.

Conclusions:

The regression effect was comparable between two types of refractive surgeries. PRK is as effective as AK for astigmatism error in cases with up to 6 D astigmatism.

Financial Disclosure:

None