contact lens


contact lens

noun

: a thin piece of round plastic that is worn on the eye to improve vision

Full Definition of CONTACT LENS

:  a thin lens designed to fit over the cornea and usually worn to correct defects in vision

Examples of CONTACT LENS

  1. She wears contact lenses more often than glasses.

First Known Use of CONTACT LENS

1888

con·tact lens

noun \ˌkän-ˌtakt-\   (Medical Dictionary)

Medical Definition of CONTACT LENS

: a thin lens designed to fit over the cornea and usually worn to correct defects in vision

contact lens

noun    (Concise Encyclopedia)

Thin artificial lens worn on the surface of the eye to correct refractive defects of vision. Early glass contact lenses, invented in 1887, were uncomfortable and could not be worn long. Plastic-based lenses, made to measurements of corneal curvature taken by optical instruments, were first developed in the mid 20th century. Gas-permeable lenses allow more oxygen to reach the eye, thus increasing comfort and wear time. Contact lenses have advantages over eyeglasses for certain visual defects and may be preferred for the sake of appearance and other reasons.

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