RESUMO
The purpose of this study was to evaluate the results of excimer retreatment for undercorrection or regression after laser in situ keratomileusis [LASIK]. Forty-six eyes received retreatment for undercorrection or regression after first LASIK. The mean manifest spherical equivalent was -2.67 +/- 0.76 D [range -1.0 to -3.75 D]. Retreatment was performed 3 to 16 months after primary LASIK [mean 5.7 +/- 2.9 months]. Retreatment was performed either by lifting the previously created flap or when this was not possible, cutting a new flap. The mean follow up after retreatment was 12.8 +/- 5.1 months. The mean age of the patients was 39 +/- 7.3 years. Proper evaluation of the patients, pre and post-operative, was done. This evaluation included UCVA, BCVA, manifest refraction, slit-lamp biomicroscopy, keratometry, tonometry, pachymetry, fundus examination and corneal topography. The study concluded that retreatment of residual myopia or regression was relatively safe and predictable, with a low risk of sight-threatening complications. However, longer- term studies may be required to detect late complications