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The Invisible lens: The Invisible lens is an advanced bifocal lens design that optimizes the transition of diopter, providing you with a more comfortable and natural vision effect, and the boundary line is not obvious,making it more beautiful.
Bifocal lenses are lenses with two different powers, usually used to correct both farsightedness and nearsightedness. The upper part of the lens is used to correct farsightedness, while a small area at the bottom is used to correct nearsightedness. This design allows the wearer to see objects at different distances without having to change glasses.
| Bifocal | ||
| DIA | SPH | ADD |
| 70/28mm | 0.00~+3.00 | +1.00~+3.00 |
| 0.00~-2.00 | +1.00~+3.00 | |
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