TN37 Retro Bifocal Clear Lens Reading Glasses +1.0+1.25+1.5+1.75+2.0+2.5+2.75

TN37 Retro Bifocal Clear Lens Reading Glasses +1.0+1.25+1.5+1.75+2.0+2.5+2.75+3.0+3.50+4.0. The unique benefit of bifocals over standard reading glasses are that they have two points of focus, for both close range and distance.

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