Glaucoma refers to a group of eye conditions that lead to damage
to the optic nerve. This nerve carries visual information from
the eye to the brain. In most cases, damage to the optic nerve
is due to increased pressure in the eye, also known as
intraocular pressure (IOP). Open-angle glaucoma; Chronic
glaucoma; Chronic open-angle glaucoma; Primary open-angle
glaucoma; Closed-angle glaucoma; Narrow-angle glaucoma; Angle-
closure glaucoma; Acute glaucoma; Secondary glaucoma; Congenital
glaucoma Causes, incidence, and risk factors Glaucoma is the
second most common cause of blindness in the United States.
There are four major types of glaucoma: Click to download -
Open-angle (chronic) glaucoma - Angle-closure (acute) glaucoma -
Congenital glaucoma - Secondary glaucoma The front part of the
eye is filled with a clear fluid called aqueous humor. This
fluid is always being made behind the colored part of the eye
(the iris). It leaves the eye through channels in the front of
the eye in an area called the anterior cha