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mar 21, 1780 - Lentes Bifocales por Benjamin Franklin.

Description:

Lentes bifocales son lentes correctivas que contienen dos potencias diferentes.

Added to timeline:

Alexander Chicas 1°-K-ITSI

ByAlexander Rivas
31 Oct 2017

Date:

mar 21, 1780
Now
~ 244 years ago

Images:

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