Procedure in which a surgeon cuts the cornea so that it is more spherical when it heals, thus reducing astigmatism.

Sensitivity to a substance, accompanied by sneezing, itching, watery eyes, difficulty breathing or rashes.

Also called lazy eye. Diminished sight in one eye.

Disorder characterized by the gradual loss of central vision due to a damaged macula (which is made up of retinal cones necessary for sight).

The American National Standards Institute's Practice for Occupational and Educational Eye and Face Protection; eyewear that meets this standard is considered safer than eyewear that does not.

Part of the eye behind the cornea and in front of the iris and lens.

Substance that inhibits oxidation and can guard the body from the damaging effects of free radicals. Molecules with one or more unpaired electrons, free radicals can destroy cells and play a role in many diseases. Antioxidants may help pr

Clear fluid in the eye that both provides nutrients and determines intraocular pressure.

Condition caused by an irregularly shaped cornea, resulting in two focal points (blurred vision).