Posters

Analysis of Corneal Biomechanics using an ultra high-speed Scheimpflug camera in corneal refractive surgery

Poster Details

First Author: J.Reyes Torres SPAIN

Co Author(s):    F. Duch Mestres   M. Martí Julia   R. Escude Blasi              

Abstract Details

Purpose:

To determine and compare the  possible changes in the parameters of the Corneal Biomechanics, measured by an ultra high-speed Scheimppflug device (Corvis ST), in a group of patients who underwent photorefractive keratectomy (PRK) or Lasik assited with femtosecond laser (femtoLASIK) in a reference center in refractive surgery.

Setting:

Refractive Surgery Department. Institut Català de Retina. Barcelona (Spain).

Methods:

Retrospective analysis of 10 biomechanical parameters measured by Corvis ST, in patients having uneventful photorefractive keratectomy (PRK) or Lasik assited with femtosecond laser (femtoLASIK). Parameters were assessed in preoperative, one and three months postoperatively. Visual acuity, spherical equivalent and laser ablation were also analyzed.

Results:

A total of 78 eyes were included in this study. For the PRK group 42 eyes were included and 36 eyes were included in the femtoLASIK group. Significant differences were found in intraocular pressure (mmHg), pachymetry (Pachy) radius of curvature (r) when compared pre and postoperative period for each of the techniques (p<0.05). The amplitude of corneal deformation (Def. Amp) was not significantly altered in any of the two techniques studied.

Conclusions:

In this study, changes in the parameters of Corneal Biomechanics after laser refractive surgery are analyzed using Scheimpflug technology. Most of the biomechanical indices studied seem not to be significantly altered after laser ablation. In patients who are candidates for refractive surgery, this technology could help us improve preoperative screening and optimize postoperative follow-up.

Financial Disclosure:

None