Resumen de Retinal Image Quality three months after Photorefractive Keratectomy for Myopia of up to -5.75 diopters
Juan Carlos Ondategui Parra, Meritxell Vilaseca Ricart, Montserrat Arjona Carbonell, Sandra Boniquet, Genís Cardona Torradeflot, José Luis Güell Villanueva, Jaume Pujol Ramo
PURPOSE: To assess changes in retinal image quality in myopic patients after photorefractive keratectomy with a double-pass instrument.
METHODS: Eighteen patients (34 eyes) with spherical equivalent of up to -5.75 diopters underwent excimer laser PRK. The patients were analyzed before surgery and three months after the procedure using a clinical double-pass-based instrument for a 4-mm pupil. The main outcome measures reflected the eye’s optical quality, by means of parameters calculated from the double-pass images acquired. Preoperative and postoperative manifest refraction and visual acuity were also reported.
RESULTS: The results showed that PRK surgery has a noticeable impact on retinal image quality and that the differences between the preoperative and postoperative stages are statistically significant (P < .05). However, patients did not report a significant change in the best spectacle-corrected visual acuity after the surgery (P = .56).
CONCLUSIONS: Although a decrease in retinal image quality in PRK patients was reported, probably due to an increase in higher-order aberrations and to intraocular scattering, the final optical quality parameters assessed at the postoperative stage gave satisfactory results. This was consistent with visual acuity outcomes and subjective reports given by the patients, who did not complain about their final visual result.
