[Effects of laser in situ keratomileusis on intraocular pressure measurements in Japanese myopic eyes].

PURPOSE: To prospectively compare preoperative and postoperative measurements of intraocular pressure (IOP) using Goldmann applanation tonometry (GAT), noncontact tonometer (NCT), and Dynamic contour tonometer (DCT) in eyes undergoing myopic laser in situ keratomileusis (LASIK) and to examine the effects of preoperative corneal curvature and IOP, and the change in central corneal thickness (CCT). METHODS: One hundred six eyes of 53 patients underwent myopic LASIK with -5.3 +/- 2.3 (mean +/- SD) diopters. Within 4 weeks before and at 1 month after LASIK, IOP using GAT, NCT and DCT and CCT were measured. RESULTS: Postoperatively, although IOP was reduced in the three measurements, IOP changes in DCT (-0.9 +/- 1.7 mmHg) were significantly lower than in the GAT (-3.6 +/- 2.1 mmHg) and in the NCT (-4.7 +/- 1.9 mmHg) measurements (p < 0.001, Tukey test). In all the measurements, the decrease in the IOP increased with the higher preoperative IOP (p < 0.001). Changes in the CCT were significantly correlated in the GAT and NCT measurements (p < 0.015). CONCLUSIONS: IOP measurements using DCT minimized the changes in IOP readings after myopic LASIK in Japanese eye. This demonstrated that the DCT was effective for IOP monitoring after LASIK.