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First Author: S.Adib-Moghaddam IRAN
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Evaluation of clinical outcomes of myopic patients with or without astigmatism who underwent Trans-PRK using the SCHWIND AMARIS 500 excimer laser.
Bina Eye Hospital
Eighty Four eyes (42 patients) with mild to moderate myopia with or without astigmatism were recruited in a prospective study at Bina Eye Hospital, Tehran, Iran, from July 2011 to November 2012. TransPRK procedure was carried out for all the cases by a single expert refractive surgeon using SCHWIND AMARIS 500 laser (SCHWIND eye-tech-solutions GmbH, Kleinostheim, Germany). Follow-up visits were performed to 9 months post-operation. Visual acuity, Epithelial healing time, post -operative pain score, haze and glare were evaluated.
Our findings showed that 95% of eyes reached Uncorrected Visual Acuity (UCVA) of 20/20 or better post operatively. The mean of UCVA improved significantly from 0.26 to 1.26 (P value?0.001) and Best Spectacle Corrected Visual Acuity (BSCVA) improved significantly from 1.09 to 1.29 (P value?0.001). No eye lost Snellen lines of BSCVA. The mean amount of restored epithelial surface was 91%ḟ8% and 100%, 48 and 72 hrs after the surgery respectively. The mean time for epithelial healing was 2.2ḟ0.6 days. Post-operative pain score at 48 hours after the surgery was found to be 1.2ḟ1.0 out of 10. There was 3 (3.6%) case with subjective haze grade of one, 6 months post-operation. No one reported glare.
Our findings showed that Trans-PRK by using SCHWIND AMARIS 500 excimer laser platform was a safe procedure and resulted in significant improvements in patient clinical outcomes post-operatively even much better than predicted results. Additional studies with long term follow-ups are needed to determine the safety and effectiveness of the procedure properly.