gas permeable lens

gas permeable lens
,gas permeable `lens noun count
a type of CONTACT LENS (=a piece of plastic you wear on your eye so that you can see clearly) that allows air to reach your eye

Usage of the words and phrases in modern English. 2013.

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Look at other dictionaries:

  • gas permeable lens — UK US noun [countable] [singular gas permeable lens plural gas permeable lenses] a type of contact lens (=a piece of plastic you wear on your eye so that you can see clearly) that allows air to reach your eye …   Useful english dictionary

  • gas permeable lens — UK / US noun [countable] Word forms gas permeable lens : singular gas permeable lens plural gas permeable lenses a type of contact lens (= a piece of plastic you wear on your eye so that you can see clearly) that allows air to reach your eye …   English dictionary

  • gas-permeable lens — /gas perr mee euh beuhl/ a semisoft contact lens, usually removed each day, that allows air to pass through to the eye and affords a wider range of vision corrections than a soft contact lens. * * * …   Universalium

  • gas-permeable lens — /gas perr mee euh beuhl/ a semisoft contact lens, usually removed each day, that allows air to pass through to the eye and affords a wider range of vision corrections than a soft contact lens …   Useful english dictionary

  • gas permeable lens — noun (C) a kind of contact lens that allows oxygen to reach your eyes …   Longman dictionary of contemporary English

  • gas-permeable — adj. Gas permeable is used with these nouns: ↑contact lens …   Collocations dictionary

  • gas-permeable — adjective (of a contact lens) allowing the diffusion of gases into and out of the cornea …   English new terms dictionary

  • 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 lens gas permeable — any contact lens that transmits oxygen and carbon dioxide …   Medical dictionary

  • contact lens non–gas permeable hard — a contact lens, generally formed of polymethyl methacrylate, that transmits little to no oxygen and carbon dioxide to the cornea. Called also PMMA contact l …   Medical dictionary

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