Purpose: To determine if there is a significant difference in central corneal thickness (CCT) among patients with normal tension glaucoma (NTG), primary open angle glaucoma (POAG) and normal patients. Methods: One hundred and thirteen patients were evaluated; 40 had NTG, 51 were normal and 22 had POAG. IOP (Goldmann) and CCT (Topcon SP-2000P) were measured in all patients. Results: The CCT mean in NTG patients was 500.95 µ (SD = 28.65µ); in normal patients the CCT mean was 521.11µ (SD = 43.30µ); and in the POAG group the CCT mean was 522.23µ (SD = 27.87µ). By statistical analysis (ANOVA, 95% confidence interval) the CCT in NTG was significantly lower than in normal patients and in the POAG group (p= 0.01 and p=0.006), but no differences was found between normal patients and the POAG group (p= 0.91). Conclusions: In this study we concluded that in a Brazilian population sample the NTG patients tend to present significantly lower ECC measurements when compared with normal and POAG patients.
Intraocular pressure; Glaucoma; Cornea
