There are several types of glaucoma, each with distinct causes and symptoms. Here are the main types of glaucoma:

Open-angle glaucoma: This is the most common type of glaucoma and occurs when the angle between the cornea and the iris is wide and allows fluid to flow freely.

Angle-Closure Glaucoma: This type of glaucoma occurs when the angle between the cornea and the iris is narrow, which prevents fluid from draining properly.

Primary normal pressure glaucoma: This type of glaucoma occurs when intraocular pressure is normal, but the optic nerve is damaged.

Secondary glaucoma: This type of glaucoma is enhanced by an underlying disease or medical condition, such as cataracts, diabetes, eye injury or infection.

Congenital glaucoma: This type of glaucoma occurs in children born with an eye defect that prevents fluid from draining properly.

It is important to consult an ophthalmologist for a correct diagnosis and appropriate treatment.