Official ESCRS | European Society of Cataract & Refractive Surgeons


Outcomes of photorefractive keratectomy with advanced beam profile for myopia

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Session Details

Session Title: LASIK & PRK II

Session Date/Time: Monday 16/09/2019 | 14:00-16:00

Paper Time: 15:36

Venue: Free Paper Forum: Podium 3

First Author: : A.Covello CANADA

Co Author(s): :    S. Holland   D. Lin   S. Arba Mosquera   V. Shwetabh   M. Al Obthani   J. Tan              

Abstract Details


To evaluate outcome of myopic photorefractive keratectomy (PRK) using Schwind Amaris (SA) refractive laser with SmartSurfACE (SS) beam profile at 12 month post-operatively.


Laser Eye Centre


Retrospective case series. 1630 eyes underwent myopic transepithelial PRK (TE-PRK) with Schwind Amaris (SA) and SmartSurfACE (SS). Outcomes were analyzed in 3 groups: moderate myopia (0.00D to -6.00D), high myopia (-6.12D to -10.00D), and extreme myopia (>-10.00D). Pre and post-operative assessment of symptoms, uncorrected visual acuity (UDVA), corrected distance visual acuity (CDVA), manifest refraction (MR), predictability, and safety were analyzed at 12 month


Evaluation of 1137 eyes moderate myopia, 371 eyes high myopia, and 122 eyes extreme myopia. Mean spherical equivalent (MSE) improved -3.56±1.62D to -0.16±0.66D for moderate myopia, -7.94±1.21D to -0.22±0.54D high myopia, and 11.80±1.54D to -0.16±0.71D extreme myopia. UDVA≥20/25 achieved by 96%(1094/1137), 91%(343/371) and 74%(92/122) respectively; ≥20/40 achieved by 85%(106/122) in extreme myopia. CDVA≥20/20 achieved by 98%(1111), 95%(357) and 77%(96) respectively; ≥20/25 achieved by 93%(116) in extreme myopia. 98%(1116), 97%(359), and 93%(114) had no change or improved CDVA respectively. 26%(32) had CDVA improved while 2%(2) lost ≥2 lines in extreme myopia group.


Trans-epithelial photorefractive keratectomy with Schwind Amaris SmartSurfACE excimer laser achieved good safety and efficacy across a wide range of myopia. Post-operative MSE was corrected to the range of plano and -0.25D with standard deviation within 0.75D in all 3 groups. More than 90% in moderate and high myopia groups achieved ≥20/25 UDVA while 85% in extreme myopia group achieved ≥20/40. 93% or more in each group had no change or improved CDVA while only 2 eyes of 1630 lost ≥2. TE PRK with an upgraded laser beam showed satisfactory results in all ranges of myopia with good efficacy and safety.

Financial Disclosure:

is employed by a for profit company with an interest in the subject of the presentation, travel has been funded, fully or partially, by a company producing, developing or supplying the product or procedure presented

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