Glaucoma: Glaucoma: Introduction Glaucoma is a group of eye conditions that damage the optic nerve, which is crucial for good vision. This damage is often caused by abnormally high pressure in the eye. Glaucoma is one of the leading causes of blindness for people over the age of 60. However, it can occur at any age but is more common in older adults. Understanding Glaucoma Glaucoma is known as the "silent thief of sight" because it often has no symptoms until noticeable vision loss occurs. The most common types of glaucoma include open-angle glaucoma and angle-closure glaucoma. Open-Angle Glaucoma Open-angle glaucoma is the most common form. It occurs when the eye’s drainage canals become clogged over time. This results in increased eye pressure and damage to the optic nerve. It is called "open-angle" becau...