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Old 01-18-2011, 05:08 AM
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Default Flat top bifocal
I am wearing bifocals, I would like to know what is the difference of flat top bifocals and regular bifocals.
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Old 01-21-2011, 02:52 AM
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Flat Top Bifocal
The flat top bifocal lens is in the shape of a half moon and is sometimes referred to as a D rim. This lens is good for those who only view near objects on occasion as the lower region of the lens that is for near-point viewing, is smaller.
Regular bifocal or The executive bifocal lens is divided into two parts by a line that is visible from either side of the lens. The top part of the lens, above the line, is for viewing things at a distance, while the bottom part of the lens, below the line, is for viewing things up close.
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Old 02-04-2011, 10:56 PM
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Default Flat Top Bifocal
Flat Top Bifocal
This lens is available with the lined bifocal portion made in a variety of widths to help with various close-up requirements. Bifocals are made in every type if lens materials.
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Old 02-10-2011, 12:39 AM
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Default Flat Top Bifocal
I am wearing bifocal for almost 5 years, but i am not aware of Flat Top Bifocal. can i order another Flat Top Bifocal glasses without changing my prescription?
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Old 02-28-2011, 10:06 PM
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Default I have a question...
why are some prescription dont work on curvy lenses like aviator?


Just curious...
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Old 03-18-2011, 02:39 AM
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this might be because of a small PD number, aviator types are mostly wide and oversized, they do not work with a small PD.
Another cause is the style itself, CURVY lenses can affect and distort vision.
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