RESUMO
PURPOSE: To analyze the modifications to the vitreous body after femtosecond laser-assisted laser in situ keratomileusis (LASIK) for myopia. SETTING: Centre Hospitalier National Des Quinze-Vingts, Paris, France. DESIGN: Case series. METHODS: B-scan ultrasonography of the posterior ocular segment was performed the day before and 48 hours after femtosecond LASIK for myopia. Posterior vitreous detachment (PVD) was diagnosed by the presence of a low-reflected mobile echogenic membrane partially or completely detached from the retina. Eyes with signs of partial or total PVD on preoperative examination were excluded. Occurrence of total or partial PVD after surgery was the main outcome measure. RESULTS: Thirty-one eyes of 18 patients (10 women; mean age 28 years ± 5 [SD]) were included in the study. The mean preoperative spherical equivalent was -4.38 diopters (D) (range -2.88 to -6.75 D). After surgery, 5 eyes (16%) developed partial or total PVD. The remaining 26 eyes had no signs of PVD postoperatively. CONCLUSION: Although less vacuum is required to create a corneal flap with a femtosecond laser than with a conventional microkeratome, the incidence of PVD after femtosecond laser-assisted LASIK was similar to that reported for microkeratome-assisted LASIK.
