Overall Any Glaucoma and Open-Angle Glaucoma Prevalence Rates
Figure 1 below shows the estimated prevalence rate for any glaucoma and open-angle glaucoma derived from the selected studies that reported an overall rate. The high degree of variation among the results in this figure is likely due to in part to methodological, disease definition, and population differences among the studies. This figure excludes studies that did not report an overall rate for the study. The figure is intended to illustrate the range of published prevalence values; direct comparison of the studies is impossible without considering the underlying differences in the studies. Detailed results from each individual study are available in the full report “Published Examination-based Prevalence of Major Eye Disorders.”
General glaucoma rates ranged from 2.1% in NHANES to 25.5% among study participants in the Atlanta VA Chart Review, and open-angle glaucoma rates ranged from 1.86% in the EDPRG to 13.8% among a sub-population of the National Long-Term Care Survey. These studies identified and compared glaucoma prevalence rates across race/ethnicity, age, education level, and income.
The wide disparity in estimates is like due largely to differences in the study sample, and whether the study included glaucoma suspects. Because of these differences, the estimates are not directly comparable. Comparing the studies is challenging because of a number of differences in patient demographics, data collection, and reporting standards. Some studies only looked at the overall glaucoma rate while others examined different glaucoma types including glaucoma suspect, open-angle, and angle closure.