Polarized Trifocal sunglass lenses
Trifocals lenses have the distance prescription power on upper portion of lens, a lined segment with reading prescription power on bottom portion and an intermediate (computer distance) prescription power in middle portion.
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About Plastic Lenses:
Plastic lenses are made with a material called CR39 Optical Plastic.
Least expensive lens
Only recommended for prescriptions of + / - 2.00 and below.
50% lighter and less breakable than glass lenses.
Scratch resistant coating is available as uncoated plastic lenses scratch very easily.
Note: Plastic Lens cannot be used for Drilled Rimless Frames. Choose Polycarbonate or Hi Index Lens for Drilled Rimless Frames.