Aid to vision

Wiktionary Word definitions in Wiktionary
n. A thin lens, made of flexible or rigid plastic, that is placed directly on to the eye to correct vision, used as an alternative to spectacles, or, if coloured, to change one's eye color cosmetically.

Wikipedia Word definitions in Wikipedia
A contact lens , or simply contact or CL , is a thin lens placed directly on the surface of the eye . CLs are considered medical devices and can be worn to correct vision , or for cosmetic or therapeutic reasons. In 2004, it was estimated that 125 million ...

WordNet Word definitions in WordNet
n. a thin curved glass or plastic lens designed to fit over the cornea in order to correct vision or to deliver medication [syn: contact ]

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ A contact lens holder - I recognized it, Mum wears them - still with the lenses in them. ▪ Amongst these are contact lens wetting solutions, comfort drops and artificial tears, which, perhaps surprisingly, have similar compositions. ...