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Old 05-27-2010, 09:17 PM
Daniel Glasses Daniel Glasses is offline
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Join Date: Oct 2009
Posts: 69
Default advantage of Bi-focal Glasses

advantage of Bi-focal lens, it contain two prescriptions, the top part of the lens will be used for your distance vision and the bottom part will be used for reading, there is a line separating distance and reading sections.

The reading section is in the shape of a D on it’s side, the bifocal has a flat top and a curved bottom.
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