A clouding of the lens of the eye that leads to dimished sight or a cataract is a condition in the eye, a clouding of the lens that affects vision. Mostly related to aging, more than half of Americans 80 years old or older have or had a cataract. Cataracts occur in one or both eyes and do not spread between eyes.

CATARACT: "Joe had an operation to remove the cataract and he could see as well as he could before he developed it."
Cite this page: N., Pam M.S., "CATARACT," in, April 7, 2013, (accessed September 24, 2021).