contact lens rigid

contact lens rigid
hard contact l.

Medical dictionary. 2011.

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  • contact lens — one of a pair of small plastic disks that are held in place over the cornea by surface tension and correct vision defects inconspicuously. Cf. hard lens, intraocular lens, soft lens. [1885 90] * * * Thin artificial lens worn on the surface of the …   Universalium

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  • contact lens — noun 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 ones eye color cosmetically. Syn: contact, lens …   Wiktionary

  • Rigid gas permeable — lenses are rigid contact lenses made of oxygen permeable polymers. Initially developed in the late 1970s, and through the 1980s and 1990s, they were an improvement over prior hard lenses that restricted oxygen transmission to the eye. Rigid… …   Wikipedia

  • Contact lenses — Lentilles de contact Verres de contact posés avec la face concave vers le haut …   Wikipédia en Français

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