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Comparison of femtosecond-assisted sub-Bowman keratomileusis and transepithelial photorefractive keratectomy for correction of myopia

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Session Details

Session Title: Advanced Surface Photoablation I

Session Date/Time: Sunday 08/10/2017 | 08:00-09:30

Paper Time: 08:24

Venue: Meeting Center Room I

First Author: : R. Zhang USA

Co Author(s): :    V. Jhanji    S. Lixia   J. Li   A. Law   M. Zhang        

Abstract Details


To compare visual and refractive outcomes of transepithelial photorefractive keratectomy (TransPRK) and femtosecond-assisted sub-Bowman keratomileusis (SBK) for the treatment of myopia.


University Hospital


This was a retrospective, nonrandomized study. A total of 480 eyes (240 patients) were included, 166 eyes in TransPRK group and 314 eyes in the SBK group. Visual and refractive results were evaluated 1 and 3 months postoperatively.


Preoperative mean MRSE (-4.00 ±1.2 vs -4.05 ±1.36 D; P=0.76) and LogMAR BCVA (-0.08 vs -0.07; P=0.86) were comparable in both groups. UCVA after TransPRK improved from 1.29 to 0.00 at 1 month (P< 0.001) and -0.05 at 3 months (P< 0.001). UCVA after SBK improved from 1.25 to -0.04 at 1 month (P< 0.001) and -0.05 at 3 months (P< 0.001). UCVA and BCVA were significantly better after SBK at 1 month (P< 0.001) but not at 3 months. MRSE after TransPRK was more hyperopic than after SBK at both 1 month (P= 0.034) and 3 months (P= 0.011).


Both TransPRK and SBK are effective procedures to correct myopia and astigmatism. TransPRK was associated with relatively slow recovery in visual acuity. Both procedures were equally efficacious at 3 months postoperatively.

Financial Disclosure:


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