Centration of excimer laser photorefractive keratectomy and changes in astigmatism


YILDIRIM GRIFFIN S. R.

The Journal of Refractive Surgery,, vol.12, no.2, pp.262-271, 1996 (SCI-Expanded)

  • Publication Type: Article / Article
  • Volume: 12 Issue: 2
  • Publication Date: 1996
  • Journal Name: The Journal of Refractive Surgery,
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
  • Page Numbers: pp.262-271
  • Istanbul University-Cerrahpasa Affiliated: No

Abstract

One of the most important factors that influence the success of PRK might be corneal centration during treatment. We evaluated our centration rate in 49 eyes by using computer-assisted corneal topography. Only single zone treated eyes were chosen for the analysis and 91.5% of the eyes were centered within a 1 mm treatment zone while 51% were within 0.5 mm. 

At the end of the follow-up time of 10.4 months, these centration zones were found to have no influence on the attempted spherical refractive outcome, whereas increasing decentration induced an increase in postoperative astigmatism.