one of a pair of small plastic disks that are held in place over the cornea by surface tension and correct vision defects inconspicuously.
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British Dictionary definitions for contact lens
a thin convex lens, usually of plastic, which floats on the layer of tears in front of the cornea to correct defects of vision
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012