Cheratectomia fotorifrattiva (PRK) customizzata per il trattamento del cheratocono.

Purpose: To assess the efficacy and safety of customized photorefractive keratectomy (PRK) to correct the refractive error in patients with keratoconus. Methods: 3 eyes of 3 patients with keratoconus (2 stage 2, 1 stage 4) underwent topographically guided PRK. MEL 70 G scan excimer laser with TOSCA program and TSA system was used for the treatment. The follow-up time was at least 6 months (range 6 - 24 months). Visual acuity, manifest refraction, corneal topography, corneal pachymetry and Hartmann-Shack aberrometry were recorded before the surgery and during the follow-up. Results: in each patient the laser procedure reduced the refractive error, improved the topographic indeces and the ocular aberrations and increased the visual acuity. No keratoconus progression was observed in the follow-up time. Conclusions: Topographically guided PRK was safety and provided excellent visual outcome in the small series of patients with keratoconus of this study, avoiding or at least delaying the need for corneal transplant. Further investigation in a larger patient population is needed to confi rm our preliminary data