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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 and 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 six 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.
D. Zadok, MD, Department of Ophthalmology, Assaf Harofeh Medical Center, Zerifin, Israel. dzadok@yahoo.com
6.1 Intraocular pressure measurement; factors affecting IOP (Part of: 6 Clinical examination methods)
8.4 Refractive surgical procedures (Part of: 8 Refractive errors in relation to glaucoma)