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Analysis of the results with transepithelial PRK for correcting refractive errors

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Session Details

Session Title: Surface Ablations for Correction of Ammetropias

Session Date/Time: Tuesday 16/09/2014 | 08:00-10:30

Paper Time: 09:42

Venue: Auditorium

First Author: : C.Ramamurthy INDIA

Co Author(s): :    D. Ramamurthy              

Abstract Details


The intent of this retrospective analysis was to evaluate the performance of Transepithelial PRK which included the feasibility of treating thin corneas or eyes with moderate myopic refractive errors and achieved the desired refractive result addressing   all the safety parameters.


The Eye Foundation Coimbatore, India


254 eyes of 131 patients, age group ranging 18 to 32 years were retrospectively analysed, in the period Jul 2011 to Jan 2013, with a follow up of 6 months. All eyes underwent Transepithelial PRK and refractive ablation provided with the EX500 Wavelight Laser System. All eyes had a stable topography and hysteresis preoperatively. The refractive error ranged from +3.00Dsph to -7.50Dsp and the astigmatism ranged from-0.25Dcyl to -4.00Dcyl. The preop CCT values ranged from 440 to 627 microns. The predictability, safety and efficacy of the procedure, the statistical significance of planned versus achieved residual bed and the visual outcomes were measured.


Residual refractive error ranged from -0.12 to -1.50 Dsph eq in 34 eyes which was gratifying keeping in mind the refractive range treated. 92.12 % of eyes had maintained BSCVA and 7.12 % of eyes gained one line of BSCVA.  Efficacy of the procedure indicates that 82.28 % had the desired visual results and 6.69 % had better than desired visual result. 87.48% had predictable residual beds. 18 eyes had very mild postop corneal haze. 4 eyes had an increase in IOP post operatively.


Transepithelial PRK is a safe and predictable option when treating thinner corneas or eyes with moderate myopic refractive errors with stable visual outcomes with acceptable safety parameters maintained.

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