Glaucoma is an ocular disease effecting more than 67 million people worldwide. The prevalence of glaucoma in South India is around 2.6% of which 90% are undetected. Any decrease in outflow due to structural changes in angle, or the angle is occluded by iris resulting in narrowing of angle causes rise in IOP resulting in Primary angle closure disease. The present study is done on 100 patients who presented to the department of Ophthalmology between age group 40-70 years with a complaint of suspected shallow anterior chamber and those with family history of glaucoma and history of hypertension. Detailed ocular examination was done, IOP was recorded and anterior chamber angle was evaluated by anterior segment OCT. The results revealed that AS-OCT detects a greater number of eyes with closed angle and gives high resolution images being non-contact method good patient compliance