Glossary of Eye and Vision Terms

Ability of the lens to adjust its shape for vision at various distances in order to produce a clear image on the retina.

Those of Asian and Native American descent are at higher risk for acute (angle closure) glaucoma. It occurs when the drainage system of the eye becomes blocked. It causes a

Acute (Angle Closure) Glaucoma occurs when the drainage system of the eye becomes blocked. It causes a sudden rise in pressure, requiring immediate, emergency medical care. The signs are usually

Annular solar eclipses are often described as a “ring of fire” because a thin outer layer of the sun’s disk is not completely covered by the moon when the moon

Space in front portion of the eye between the cornea and the iris and lens, which is filled with aqueous humor.

Clear, watery fluid that fills the anterior chamber and the posterior chamber in the front part of the eye and provides nutrients to structures in the anterior chamber.

The main exit route of aqueous humor from the eye, including the trabecular meshwork and Schlemm’s canal.

Astigmatism (uh-STIG-muh-tiz-um) is a common and generally treatable vision issue when the cornea (clear part in the front of the eye) is not completely round. It is curved more like