Although spectacles were invented near the end of the thirteenth century, there is little evidence that concave lenses were generally used to aid the nearsighted before the middle of the sixteenth century. However, Lucas Cranach's “Adulteress before Christ,” painted about 1500, shows a pair of spectacles with lenses which apparently were concave.
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Lenses
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© 1954 American Association of Physics Teachers.
1954
American Association of Physics Teachers
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