What Are Gas Permeable Contact Lenses

what are gas permeable contact lenses
    contact lenses
  • (contact lens) contact: a thin curved glass or plastic lens designed to fit over the cornea in order to correct vision or to deliver medication
  • A thin plastic lens placed directly on the surface of the eye to correct visual defects
  • (contact lens) 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 one's eye color cosmetically
  • (Contact lens) A small plastic disc containing an optical correction that is worn directly on the cornea as a substitute for eyeglasses.
    gas permeable
  • (Gas permeability) is the permeability of an insulating layer for gaseous substances. The gas flow requires a difference of pressure and is characterized by the permeability coefficient (DIN 53380, DIN 535536, ISO 1399).
  • (Gas Permeability) the ability of a gas or other volatile substance to penetrate a material. Materials that will allow significant passage of gases are said to be permeable, while materials that resist or stop the passage of gases are said to offer gas barrier properties.
  • (of a contact lens) Allowing the diffusion of gases into and out of the cornea
  • (Gas Permeability) Amount of air that can go through a lens.
    what are
  • Often, the population to be studied produces paired values, in other words, each individual or experimental result contributes a set of two values. This section briefly describes what bivariate data are.
  • characteristic features of science and how science differs from other areas of human knowledge

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What Is That Feeling...
What Is That Feeling...
"What is that feeling when you're driving away from people and they recede on the plain till you see their specks dispersing? --it's the too-huge world vaulting us, and it's good-by. But we lean forward to the next crazy venture beneath the skies." ~Jack Kerouac

what are gas permeable contact lenses