Materials and Methods: 195 nonglaucomatous male cases with a mean age of 53.7±7.1 (range:40-68 years) were divided into three groups according to their ages. Group 1 consisted of 58 cases (range:40-49 year-old), group 2 consisted of 93 cases (range:50-59 year-old) and group 3 consisted of 44 cases (over 60-year-old). The cases were also divided into three groups according to their smoking status. 47 of the cases had never smoked before (nonsmokers), 76 of them were active-smokers at the time of the study and 72 cases hadnot smoked for at least 1 year before the study (ex-smokers). Nonparametrik t-test, ANOVA one way variance analysis and regression analysis were used in statistical analysis.

Results: The mean IOP was 13.1±2.4 mmHg in non-smokers, 14.7±2.2 mmHg in ex-smokers and it was 15.8±2.6 mmHg in active-smokers. The mean IOP of active-smokers was found to be statistically significantly higher than the IOPs of non-smokers and ex-smokers (P<0.001, P=0.005). No significant differences were detected between the IOPs according to the smoking status in group 1 but, in group 2 and 3, the IOPs of the non-smokers were found to be statistically significantly lower than the ex-smokers and the active smokers (P<0.001).

Conclusion: The IOP was found to be lower in non-smokers than active smokers and ex-smokers in normal population especially in older ages. Keywords : Smoking, glaucoma, intraocular pressure