Posters

Optical quality following myopic refractive surgery: LASIK vs PRK vs SMILE

Poster Details

First Author: P.Vaddavalli INDIA

Co Author(s):    S. Sarkar   S. Bharadwaj           

Abstract Details

Purpose:

To assess the efficacy, predictability and visual quality following photorefractive keratectory (PRK), LASIK and small incision lenticule extraction (SMILE)

Setting:

L V Prasad Eye Institute, Hyderabad, India

Methods:

43 patients with myopic astigmatism were randomized to undergo either femtosecond LASIK, PRK or SMILE surgery. PRK and LASIK were performed on the Technolas 217z excimer laser. The flap in femtoseocnd LASIK was ceated using the Visumax (Carl Zeiss Meditec) femtosecond laser system and the SMILE was performed using the same system. Pre-operative, 1 week and 1 month postoperative dats was analyzed. The main outcomes reported in this study were best corrected high (98%) contrast and low (25%) contrast acuity using COMPLOG LogMAR visual acuity chart, manifest objective refraction and ocular aberration measured using the IMAGINE EYES Irx3 aberrometer

Results:

Of 43 patients, 17 underwent SMILE, 14 F-LASIK and 12 PRK. The mean spherical equivalent pre and post-operatively was -5.97±1.92D and +0.63±0.15 in LASIK, -3.61±1.87 and +0.81±0.33 in PRK and -5.43±1.36 and +0.33±0.15 in SMILE. The best corrected high and low contrast acuity improved in all SMILE patients. High contrast acuity remained the same in LASIK but low contrast acuity showed a reduction. PRK patients had a reduction in both high and low contrast acuity. HOA increased in all three groups at 1 month post-op but were statistically significant in PRK (p<0.001) and F-LASIK (p<0.001) but not in SMILE (p=0.11)

Conclusions:

Accuracy of refractive correction was similar in all three procedures, but the visual and optical outcomes were better in patients undergoing SMILE compared to either LASIK or PRK. None of the patients lost any lines of BCVA. FINANCIAL INTEREST: NONE