Myopic regression five years after photorefractive keratectomy (PRK): a retrospective comparative study
Session Details
Session Title: Surface Photoablation
Session Date/Time: Monday 12/09/2016 | 14:30-16:30
Paper Time: 14:36
Venue: Hall C1
First Author: : M.Elgharib EGYPT
Co Author(s): : H. Elnahas M. Elsebaey O. Alnahrawy A. Alnahrawy
Abstract Details
Purpose:
To compare myopic regression five years after photorefractive keratectomy with and without application of Mitomycin-C employed in the treatment of mild and moderate myopic cases and identify possible risk factors in patients with higher myopic regression.
Setting:
Ophthalmology Department, Faculty of Medicine, Suez Canal University Teaching Hospitals, Ismailia, EGYPT.
Methods:
After Research Ethics Committee approval of our faculty for our research, 152 eyes were treated by PRK for correction of mild and moderate myopia in 2010. Seventy-two (72) eyes had Mitomycin-C applied intra-operatively (Group A) and 80 eyes PRK without MMC (Group B).
Results:
Group A showed 50% of patients had VA 20/20, 31.9 % had 20/32 and 18.1 % had scores from 20/40 to 20/125 while in Group B showed 30 % with VA 20/20, 40 % with VA 20/32 and 20 % scoring 20/40 to 20/80 and 10 % showing scores of 20/125 or less.
Regarding the myopic regression in terms of a spherical error, Group A had 16.6% with an error of 0.00 to -0.50D, 41.6% between -0.51 to -1.00D, 27.7% with -1.01 to -1.50D, and 14.1% with errors higher than -1.51D while in Group B; 10% (0.00 to -0.50D), 35 % (-0.51 to -1.00D), 30% (-1.01 and -1.50D) and 25% with a regression of more than -1.51D or more.
Conclusions:
Factors associated with regression were: Higher initial refractive error, younger age of the patient, short term steroid use postoperatively, untreated dry eye diseases, excessive near work, prolonged exposure to UV rays, pregnancy, lactation, trauma, and in cases which had no application of intraoperative Mitomycin C (specially with PRK treatments).
Financial Disclosure:
NONE
