Posters

Automated assessment of point spread function break up time after laser vision correction procedures

Poster Details

First Author: Y.Weill ISRAEL

Co Author(s):    D. Zadok   A. Abulafia   L. Wasser   A. Shoshani   D. Smadja        

Abstract Details

Purpose:

To analyze the early postoperative impact of laser vision correction procedures on the stability of the visual function using a double-pass aberrometer device.

Setting:

Ophthalmology Department, Shaare Zedek Medical Center, Jerusalem, Israel. iSEARCH, Innovation Shaarezedek Eye Advanced Research Center Hub, Jerusalem, Israel

Methods:

Retrospective and comparative study including 100 eyes of 100 patients analyzed preoperatively and 3 months after PRK (50 eyes) and LASIK (50 eyes). The visual function stability analysis was performed using a double-pass aberrometry (HD Analyzer, Visiometrics S.L, Terrassa, Spain) and included vision break-up time (VBUT), objective scattering index (OSI), modulation transfer function (MTF), and Strehl Ratio (SR). Results were compared between PRK and LASIK surgery.

Results:

No statistical significant difference was found at 3 months postoperatively in VBUT, with mean changes of 0.38± 1.11 (p = 0.24) and 0.33± 2.95 (p = 0.61), respectively in LASIK and PRK groups. No statistically significant difference in VBUT was observed at baseline (p=0.85) and at 3 months postoperative (p=0.13) between LASIK and PRK. Postoperative optical quality metric MTF, SR and OSI, remained unchanged at the 3 months follow up in both groups as compared to baseline values (p=0.11, p=0.23, p=0.39 respectively).

Conclusions:

Both laser vision correction procedures, LASIK and PRK, were not associated with an early decrease in retinal point spread function stability nor degradation of optical quality parameters.

Financial Disclosure:

None