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bifocal lens

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bifocal lens

In medicine, lenses consisting of an upper section that improves distant vision and a lower section that facilitates reading. They are used most commonly to correct defects in vision that occur as part of the natural ageing process. Similar improvements in vision may be obtained using varifocal lenses.
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Incomnet markets long-distance service, manufactures and markets bifocal lens, and operates a network that allows automobile dismantlers to buy, sell and trade auto parts.
INCOMNET INC. REPORTS CONVERSION OF SHARES by Daily News (Los Angeles, CA)
That may no longer be necessary if a new bifocal lens implanted by surgeons in Columbus, Ohio, last month proves successful.
Bifocal lenses implanted for cataracts by Science News
NYSE:BMM), reports that it is again accepting orders for its popular Continua(TM) D28 bifocal lens.
Vision-Ease Lens Expands Production of Continua D28 Bifocal Lenses; ... by Business Wire
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