Laser in situ keratomileusis after photorefractive keratectomy for myopic regression.
OBJECTIVE
To assess the efficacy and safety of laser in situ keratomileusis (LASIK) for regression after excimer laser photorefractive keratectomy (PRK).


METHODS
Eye Research Center, Istanbul University, Istanbul, Turkey.


METHODS
Laser in situ keratomileusis to treat residual myopia ranging from 1.50 to 12.50 diopters (D) (mean 5.96 D +/- 3.06 [SD]) was performed in 45 eyes of 25 patients. Cylindrical corrections were done in 7 eyes (15.6%) and spherical ablations, in 38 (84.4%). The mean interval between primary PRK and LASIK retreatment was 18.50 +/- 8.12 months. The procedure was performed under a hinged corneal flap using the Chiron Automated Corneal Shaper and Chiron Keracor 116 excimer laser.


RESULTS
Six months after LASIK retreatment, mean spherical equivalent refraction was -0.67 +/- 0.77 D. Thirty-six eyes (80%) were within +/- 1.00 D of emmetropia. Uncorrected visual acuity was 20/40 or more in 31 eyes (68.9%); 2 eyes (4%) lost 2 lines of best spectacle-corrected visual acuity. There was no statistically significant difference in corneal haze before and after LASIK.


CONCLUSIONS
Laser in situ keratomileusis was safe and effective for treating residual myopia after excimer laser PRK.
Ozdamar
A
A
Istanbul University, Eye Research Center, Turkey.
Sener
B
B
Aras
C
C
Aktunç
R
R
D000328:Adult; D003319:Corneal Stroma / Q000601:surgery*; D005260:Female; D006801:Humans; D053685:Laser Therapy / Q000379:methods; D054018:Lasers, Excimer; D008297:Male; D009216:Myopia / Q000601:surgery*; D013508:Ophthalmologic Surgical Procedures; D018903:Photorefractive Keratectomy; D012029:Refraction, Ocular; D012086:Reoperation; D012449:Safety; D013524:Surgical Flaps; D014792:Visual Acuity