Glaucoma is a disease characterised by usually high pressure inside the eye that damages the optic nerve and may lead to permanent loss of vision. Not all 3 criteria (that is, high pressure inside the eye, optic nerve damage, and vision loss) are required to diagnose glaucoma; however, a diagnosis of glaucoma is certain when all 3 criteria are present.
What are the types of Glaucoma?
There are 2 main types of glaucoma: Open-Angle Glaucoma Angle Closure Glaucoma The fluid of the eye (aqueous) circulates through anterior chamber and passing through the angle exits from the eye into the Canal of Schlemn. In open-angle glaucoma, the passage to the canal of Schelmn offers resistance to the flow of aqueous. In angle-closure glaucoma the angle of the chamber is narrow or gets closed preventing the drainage of aqueous from the eye. Both the situations lead to increase in intraocular pressure.