What do people with glaucoma know about their condition? A comparative cross-sectional incidence and prevalence survey

Purpose: To assess and compare glaucoma knowledge between patients with established glaucoma, newly diagnosed glaucoma and the general population. Methods: 208 glaucoma patients, 100 newly diagnosed glaucoma patients from three clinical centres and 100 controls from non‐ophthalmology outpatient clinics, were recruited and completed a validated self‐administered true/false questionnaire assessing glaucoma knowledge. Demographic data were also recorded. Glaucoma knowledge score, out of a maximum of 22, and odds ratios (OR) with 95% confidence intervals (CI) of survey characteristics associated with falling in the lowest quartile of the overall knowledge score was evaluated for each study group. Results: Established glaucoma patients had (median 17, interquartile range 15–19) marginally but significantly (P