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PRK or LASIK for best uncorrected vision in extreme myopes?

Poster Details

First Author: D.Lin CANADA

Co Author(s):    S. Holland              

Abstract Details


To compare one-year outcomes of extremely myopic patients between PRK and LASIK.


Laser refractive clinic.


64 eyes with more than -10.00D spherical equivalent (SE) preoperatively underwent laser refractive surgery using Allegretto Wavelight laser. 45 eyes were treated via trans epithelial PRK and 19 were treated via LASIK. One year postoperative uncorrected visual acuity (UVA), best corrected visual acuity (BSCVA), manifest refraction (MR) predictability were evaluated and compared.


53.3% (24/45) PRK patients showed UCVA ?20/20 compared to 21.1% (4/19) of LASIK patients. 80.0% (36/45) PRK patients had no change in BSCVA and 17.8%(8/45) lost one line compared to 73.7% (14/19) LASIK patients had no change in BSCVA and 21.1% (4/19) lost one line. 75.5% (34/45) PRK patients showed postoperative SE +/- 0.50D compared to 63.2% (12/19) of LASIK patients.


In extreme myopia, more patients achieved 20/20 UCVA with PRK than LASIK although non –significant in a small study. PRK for extreme myopia appears to be non- inferior to LASIK with potentially higher safety FINANCIAL DISCLOSURE?: No

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