|
مقاله
|
Abstract
|
|
|
|
Title:
|
Stereopsis after Photorefractive Keratectomy
|
|
Author(s):
|
Mahmoud Jabbarvand, Hesam Hashemian, Pasha Anvari, and Mehdi Khodaparast
|
|
Presentation Type:
|
Poster
|
|
Subject:
|
Cornea and Anterior Segment
|
|
Others:
|
|
|
Presenting Author:
|
|
|
Name:
|
Pasha Anvari
|
|
Affiliation :(optional)
|
Tehran University of Medical Sciences, Farabi Eye Hospital
|
|
E mail:
|
panvari@student.tums.ac.ir
|
|
Phone:
|
88010558
|
|
Mobile:
|
09122490767
|
|
|
|
|
Purpose:
|
To evaluate the effect of photorefractive keratectomy (PRK) on stereoacuity of myopic and hyperopic eyes.
|
|
Methods:
|
This prospective observational cohort study included 180 patients undergoing PRK, aiming for emmetropia. Stereoacuity (SA) was measured under photopic conditions (85 cd/m2) at near (nSA) and far (fSA), preoperatively (with corrective glasses on) and one month, three months and one year postoperatively. A repeated-measure ANOVA test was used to assess changes of stereopsis over time in three groups of patients (myopia> 6D, myopia < 6D, and hyperopia < 4D).
|
|
Results:
|
The study included 60 patients with low myopia < 6D, 60 patients with high myopia > 6D, and 60 patients with hyperopia < 4D. Mean preoperative nSA was 121.16 ± 149.92 sec arc, which improved to 83.66 ± 75.84 sec arc (P<0.001) one month and 80.66 ± 64.31 sec arc three months postoperatively (P<0.001), and stayed unchanged 83.33 ± 75.01 sec arc one year after (P=0.610). fSA improved significantly 3 months after surgery and remained unchanged afterward. Patients with high myopia (>6) showed greatest improvement in near stereopsis following PRK, compared with those with low myopia and hyperopia (P<0.001).
|
|
Conclusion:
|
Stereopsis improved following PRK. Patients with high myopia may benefit most from PRK in terms of improvement in stereopsis.
|
|
Attachment:
|
5860.pptx
|
|