Efficiency, Predictability and Security of the Trans-epithelial Photorefractive Keratectomy

Efficiency, Predictability and Security of the Trans-epithelial Photorefractive Keratectomy (Trans-PRK) for Low and Medium Myopia and Astigmatism: Retrospective Study About 118 Eyes

The photorefractive keratectomy was the first correction mode refractive laser. It's a photo-ablation of a predetermined thickness of anterior corneal stroma. Debridement of epithelium can be done either mechanically (m-PRK) or by laser (trans-PRK). Trans-PRK has a lot of interests: facility and speed of procedure as well as suppression of human variable. Very good results are obtained by m-PRK. The aim of this study is to show equivalence or non inferiority of trans-PRK over conventional m-PRK in terms of safety and refractive efficiency

Inclusion Criteria:

• patients with stable refractive error (more than 2 years)
• Myopia up to -4.00 diopters and astigmatism up to -3.00 diopters

Exclusion Criteria:

• Phototherapeutic keratectomy (PTK)