Glaucoma is a group of eye conditions that damage the optic nerve, often due to increased pressure in the eye. This pressure can result from a buildup of fluid that normally drains from the eye. If left untreated, glaucoma can lead to vision loss or even blindness. It is often called the "silent thief of sight" because it can progress without noticeable symptoms until significant damage has occurred. There are different types of glaucoma, including open-angle glaucoma and angle-closure glaucoma. Regular eye exams are essential for early detection, as many people may not realize they have the condition. Treatment options include medications, laser therapy, and surgery to help manage eye pressure and protect vision.