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Vienna 2018 Delegate Registration Programme Exhibition Virtual Exhibition Satellites 2018 Survey


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Stereoacuity changes after transepithelial photorefractive keratectomy in anisometropia

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Session Details

Session Title: Presented Poster Session: Refractive Surgery New Techniques/Instrumentation/Devices I

Venue: Poster Village: Pod 2

First Author: : H.Hasani IRAN

Co Author(s): :                           

Abstract Details


To determine the changes of setreoacuity after trans-epithelial photorefractive keratectomy (T-PRK) procedure in anisometropic myopic eyes.


Bina Eye Hospital


In this quasi-experimental study performed on myopic patients with at least 1 D of anisometropia who underwent T-PRK with mitomycin-C (MMC) for treatment of myopia using Amaris 500-Hz excimer laser (SCHWIND eye-tech solutions GmbH, Germany). Stereoacuity changes measured by TNO and butterfly stereoacuity test before T-PRK and 1, 3 and 6 months postoperatively.


108 eyes of 54 patients (44.4% male and 55.6% female) with mean age of 26+/- 4 years and mean myopia of -4.24+/-1.22 D and mean astigmatism of 1.1+/- 0.75 D were enrolled. The preoperative mean stereoacuity values 99+/- 5.44 sec/arc and 52.6+/-3.5 sec/arc by TNO and Butterfly Stereoacuity test changed to 85+/-4.56 sec/arc (P<0.05), and 46.5+/-1.3 sec/arc (P<0.05) respectively at 6 months after T-PRK. Total proportion of improvement in stereoacuity values was 14.1% and 11.5% by TNO and Butterfly Stereoacuity tests respectively.


Stereoacuity improves after T-PRK in anisometropic myopic patients. TNO test can detect this improvement better than Butterfly test.

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