Globally, glaucoma is a leading cause of irreversible blindness. In India approx. 11.2 million People aged above 40 years are affected with glaucoma. Studies shows that the prevalence of this disease increases with age & more than 90% are unaware of it. Lack of awareness about glaucoma is an important reason for its late presentation which significantly increases the risk of blindness. A Hospital based cross sectional study was conducted in the ophthalmology department of NMCH, Patna. Total 1860 patients of age group 20-80 years coming to OPD were enrolled for the study. The study was conducted by using a pre structured questionnaires. The questions were in English & local language (Hindi). Each question had 3 options and patient had to choose one. Source of information about glaucoma was also enquired. Data were collected through face to face interviews. In our study overall awareness on glaucoma was 16.02%. Male patients were comparatively more aware than females. Similarly urban & semi-urban residents were more aware than rural population. As the age and education increased level of awareness & knowledge increased. Major source of information was from doctors, health personnel & mass media. A large number of participants had heard about the local term used for glaucoma i.e. kalamotia but few were actually aware about it and very few were aware of the fact that in glaucoma, the raised intraocular pressure damage the nerve resulting in blindness. Progression of glaucoma can only prevented by early diagnosis and treatment. So, awareness about the glaucoma will help in early detection, a very important step in preventing glaucoma related blindness. We can decrease the prevalence of glaucoma by spreading awareness and screening of risk group population.