omnifocal lens

omnifocal lens: [͵ɒmnıʹfəʋk(ə)lʹlenz] опт.
линза с переменной оптической силой (в разных частях)

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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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