This document discusses glaucoma, including what causes it, types of glaucoma, and treatments. Glaucoma is a disease that causes damage to the eye due to increased pressure from fluid inside the eye. There are two main types: open angle glaucoma, the most common type where fluid drainage is blocked, and angle closure glaucoma where the drain becomes too narrow. Treatments aim to lower pressure by decreasing fluid production or increasing outflow, through drugs like prostaglandin analogues, beta blockers, alpha agonists, and carbonic anhydrase inhibitors. Miotic drugs may also be used but have more side effects. Treatment depends on the type of glaucoma and may involve multiple drug