Posters

Refractive, topographic stability and predictability during the first year after laser in situ keratomileusis (LASIK) or photorefractive keratectomy (PRK) in hyperopic astigmatic eyes

Poster Details

First Author: A.Frings GERMANY

Co Author(s):    J. Steinberg   V. Druchkiv   S. Linke   T. Katz           

Abstract Details

Purpose:

This study analyses the changes in refraction and corneal shape during the first year after LASIK or PRK in hyperopic astigmatic eyes.

Setting:

Medical University Hospital Hamburg-Eppendorf, Germany; Universitätsklinikum Erlangen, Germany

Methods:

This retrospective study included 318 hyperopic eyes; 228 were treated with LASIK and 90 with PRK. Changes of mean keratometry and spherical equivalent were analyzed during three consecutive follow-up intervals (up to 60 days, 61–120 days, and 121–365 days).

Results:

Regardless of surgical procedure, postoperative changes of mean keratometry and spherical equivalent were significant (p<0.001). There were also significant differences (p<0.001) between mean keratometry and spherical equivalent within all intervals. Absolute changes of postoperative mean keratometry and spherical equivalent were smaller after LASIK. In 51 cases regression of more than 1 D occurred.

Conclusions:

Changes in postoperative mean keratometry and spherical equivalent occurred up to one year in LASIK and PRK eyes, but absolute regression after LASIK was less. Our data support the thesis that less accurate predictability of hyperopic LASIK is because of mean keratometry regression and not because of accommodation.

Financial Disclosure:

NONE