Posters

Long-term follow-up of photorefractive keratectomy for asymmetrical topographies: refractive results

Poster Details

First Author: A. Renna SPAIN

Co Author(s):    L. Brenner   J. Alio                 

Abstract Details

Purpose:

To evaluate refractive results of photorefractive keratectomy (PRK) in eyes with asymmetrical topographies, and to compare such outcomes with a control-matched group of normal topographies.

Setting:

Vissum, Alicante, Spain.

Methods:

Thirty eyes with asymmetrical topographies, with superior-inferior dioptric difference (SI) > 1.40 D, were compared to 30 eyes with normal topographies. Both groups were matched for age, spherical equivalent (SE), keratometry, corneal astigmatism, pachymetry, residual stromal bed, ablation depth (AD), and Percentage Tissue Altered (PTA). Refractive outcomes were evaluated 3- and 12-months after PRK retrospectively and after more than 3 years postoperatively in those patients that continued the follow-up prospectively.

Results:

The mean preoperative SI index in the asymmetrical group was 2.06 ± 0.56 D vs. 0.09 ± 0.75 D in the control group (P<0.001). At 12-months postoperative, 90% of all eyes were between ± 0.50 D of SE and this result was stable after 3 years.

Conclusions:

Refractive results were comparable between the two groups demonstrating long-term refractive effectivity and safety of PRK for asymmetrical topographies.

Financial Disclosure:

NONE