Who Is Credited With Inventing Bifocals

Ben franklin's inventions: bifocals Bifocals bifocal segment Executive bifocal readingglasses bifocals bi magnetic

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Invented bifocals benjamin Bifocals, 1760s. /nbenjamin franklin's sketch for bifocal eyeglasses Who invented bifocals? inventions and inventors for kids***

The main uses for bifocals

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