Primary or chronic open angle glaucoma is a painless condition usually associated with high pressure in the eye. It affects approximately 4 per cent of all people over the age of 50. Untreated, glaucoma is a major cause of blindness worldwide. Essential information about glaucoma and its treatment is presented here in a simple question and answer format to allow patients to participate actively in the decision-making process along the road to successful maintenance of their vision. Dr Trope provides the answers to dozens of commonly asked questions in sections headed All About Glaucoma, Tests for Glaucoma, and All About Treatment. Also included are discussions of possible complications, detailed illustrations, and a listing of glaucoma societies in Canada, the United States, and United Kingdom. This valuable guide is an essential reference not only for patients but also for all health-care professionals, including general practitioners and optometrists.