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What Are Bifocal Buddies?

Bifocals focus light through two lenses. They are usually prescription glasses that correct the distance vision on top, and the reading vision on bottom. Note that the computer monitor usually is positioned at an intermediate distance, so it is not in perfect focus through the top or the bottom of typical bifocals. Individuals who see well in the distance without glasses will sometimes wear readers halfway down their nose, but this only corrects their near vision for close or intermediate - not both.
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