In the healthy eye a clear liquid called aqueous humor circulates inside the front portion of the eye. To maintain a
constant healthy eye pressure, your eye continually produces a small amount of aqueous humor and an equal amount of
this fluid flows out of the eye through a microscope drain called a trabecular meshwork in the drainage angle.
A less common form of
glaucoma
called Closed-Angle glaucoma occurs when the drainage angle of the eye becomes blocked. The iris, the colored part of the
eye, may close off the drainage angle. People of Asian descent and those who are far-sided tend to be more at risk for
developing this form of glaucoma.