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Evaluation of the photorefractive keratectomy effect on stereoacuity in anisometropic myopia

Poster Details

First Author: H.Hasani IRAN

Co Author(s):    F. Karimian   M. Aghazade Amiri   M. Tabatabaie   N. Dadbin           

Abstract Details

Purpose:

To determine changes of streoacuity in anisometropic myopic eyes after photorefractive keratectomy (PRK).

Setting:

Shahid Beheshti University of Medical Sciences

Methods:

This clinical trial study was performed in myopic patients with at least 1 D anisometropia (in spherical equevalent, spherical or astigmatism)who underwent PRK by Technolas 217 Z excimer laser machine. Changes in streoacuity was observed by TNO and butterfly stereoacuity test before PRK and at 2 weeks, 1 month and 3 months after PRK.

Results:

98 eyes of 49 patients (71.4% male and 28.6% female) with mean age of 28� 5.5 years and mean myopia of -3.32�1.74D and mean astigmatism of 1.3� 1.3D were enrolled in study.The preoperative mean stereoacuity values 102� 103.44 sec/arc and 56.8�41 sec/arc by TNO and Butterfly Stereoacuity test changed to 90�110.52 sec/arc (P=0.009) , and 56.5� 41.3 sec/arc (p=0.805) respectively at 3 months after PRK. Total proportion of improvement in stereoacuity values was 10.2% and 6.12% by TNO and Butterfly Stereoacuity test respectively.

Conclusions:

Stereo acuity improves after photorefractive keratectomy in anisometropic myopic patients. This improvement is more significant with TNO test than the Butterfly Stereoacuity test.

Financial Disclosure:

NONE

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