Around 1000AD, the first vision aid was invented (inventor unknown) called a reading stone, which was a glass sphere that was laid on top of the material to be read that to magnified the letters. Around 1284 in Italy, Salvino D'Armate is credited with inventing the first wearable eye glasses.
Sabado, Hunyo 11, 2011
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1 (mga) komento:
ito po ang invention bec. of necessity
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