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omnifocal lens

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См. также в других словарях:

  • omnifocal lens — a lens whose power increases continuously and regularly in a downward direction, thereby avoiding the discontinuity in field and power of a bifocal or trifocal lens. Called also progressive l …   Medical dictionary

  • Lens — The transparent structure inside the eye that focuses light rays onto the retina (the nerve layer that lines the back of the eye, senses light and creates impulses that go through the optic nerve to the brain). The lens was named after the lentil …   Medical dictionary

  • progressive lens — omnifocal l …   Medical dictionary

  • om|ni|fo|cal — «OM nuh FOH kuhl», adjective. having continuously varying focal lengths: »Omnifocal lenses eliminate a typical sharp break between lens segments of bifocals (Chicago Tribune) …   Useful english dictionary

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