Only right eyes were considered for analysis. Parametric and nonparametric tests were used to compare continuous variables, according to data distribution. The χ2 test was used to compare categorical data. In all analyses, IOP measurements were adjusted for age, sex, body mass index, central corneal thickness (CCT), previous diagnosis of systemic arterial hypertension and diabetes, and for the presence of PAS in order to minimize the effect of these well-known confounders in IOP measurement. Regarding the AS-OCT quantitative analysis, IOP was also adjusted for pupil diameter measured in dark conditions. Multiple regression using analysis of covariance with standard least-square analysis was performed. Well-known IOP measurements confounders were included in the model, regardless of statistical significance. The mean adjusted IOP and standard error (SE) values were obtained and compared among eyes with zero, one, two, three, and four quadrants with closed angle using ANOVA and least square mean differences using Tukey honest significance difference tests (for multiple comparisons). In the remaining analysis, the α level was set at 0.05. Statistical analyses were performed using data analysis software (JMP 5; SAS Institute, Inc., Cary, NC) and statistical analysis software (SPSS, version 13; SPSS Inc., Chicago, IL).