Knowledge of bifocal lenses
Bifocal lenses. It is divided into Dome Double light, Flat Top double light, Invisible Double light
5. The unique TCM coating process on the lens surface is convenient for processing and better protects the lens.
The so-called flat top bifocal is to paste a small lens on top of a lens. This small lens is semi-circular. When grinding the lens, this small lens should be placed in the lower position of the lens. When people face the line of sight. Pass through the center of the lens, but when people look close, the line of sight just passes through this small patch, so the close objects can be seen clearly. The disadvantage of this lens is that others can clearly see that there is a small lens on your lens from the front, but it is very practical.
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Sophie Yang
004@mikeeyewear.com
