PURPOSE: To determine whether hyperopic laser in situ keratomileusis (H-LASIK) affects Goldmann applanation tonometry measurements. DESIGN: Retrospective, comparative, self-controlled case series. PARTICIPANTS: One hundred eight eyes of 58 patients were enrolled in the study. METHODS: Baseline intraocular pressure (IOP) was measured by Goldmann applanation tonometry. These readings were compared with readings obtained at least 6 months after surgery. RESULTS: After H-LASIK, a decrease was observed in the measured IOP of treated eyes that could not be related to the degree of hyperopia treated or to the treatment zone diameter. A significant difference was observed between the IOP before and after surgery (P < 0.00001). CONCLUSIONS: The applanation tonometer underestimates the true IOP after LASIK for hyperopia.
PURPOSE: To determine whether hyperopic laser in situ keratomileusis (H-LASIK) affects Goldmann applanation tonometry measurements. DESIGN: Retrospective, comparative, self-controlled case series. PARTICIPANTS: One hundred eight eyes of 58 patients were enrolled in the study. METHODS: Baseline intraocular pressure (IOP) was measured by Goldmann applanation tonometry. These readings were compared with readings obtained at least 6 months after surgery. RESULTS: After H-LASIK, a decrease was observed in the measured IOP of treated eyes that could not be related to the degree of hyperopia treated or to the treatment zone diameter. A significant difference was observed between the IOP before and after surgery (P < 0.00001). CONCLUSIONS: The applanation tonometer underestimates the true IOP after LASIK for hyperopia.