Glaucoma (https://asgeyehospital.com/specialities/glaucoma/) is a group of eye conditions that damage the optic nerve, which is essential for good vision. This damage is often caused by increased pressure inside the eye, known as intraocular pressure. Glaucoma is one of the leading causes of blindness worldwide, and it is often called the "silent thief of vision" because it can progress without noticeable symptoms in its early stages.