contact lens

noun
1.
one of a pair of small plastic disks that are held in place over the cornea by surface tension and correct vision defects inconspicuously.
Compare hard lens, intraocular lens, soft lens.
Origin
1885-90
British Dictionary definitions for contact lens

contact lens

noun
1.
a thin convex lens, usually of plastic, which floats on the layer of tears in front of the cornea to correct defects of vision
contact lens in Medicine

contact lens n.
A thin plastic or glass lens that is fitted over the cornea of the eye to correct various vision defects.