Glaucoma is a group of related eye disorders that cause damage to the optic nerve that carries information from the eye to the brain. It usually happens when fluid builds up in the front part of your eye. That extra fluid increases the pressure in your eye, damaging the optic nerve.
Causes of Glaucoma -
It’s the result of high fluid pressure inside your eye. This happens when the liquid in the front part of the eye doesn't circulate the way it should. Normally, the fluid, called aqueous humor, flows out of your eye through a mesh-like channel. If this channel gets blocked, the liquid builds up. That’s what causes glaucoma.
Types of Glaucoma -
1. Open-angle glaucoma : This is the most common type of glaucoma. It happens slowly, where the eye does not drain fluid as well as it should. Thus, eye pressure builds and starts to damage the optic nerve.
2. Angle-closure Glaucoma :This type happens when someone’s iris is very close to the drainage angle in their eye. The iris can end up blocking the drainage angle.