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Definition : Pieces of transparent materials, such as glass and plastic, so shaped as to converge or scatter the rays of light to increase the visual acuity of the human eye. Lenses may be specially design to be mounted in appropriate frames (i.e., eyeglasses) or other instruments, to be placed directly on the eyes (contact lenses), or to be implanted in the eyes (i.e., intraocular lenses).

UMDC code : 12322

U.S.companies only
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