Optics of corrective lenses. 18th-century diagrams on optics, showing the path of light through corrective lenses. The path of light through such lens

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Optics of corrective lenses. 18th-century diagrams on optics, showing the path of light through corrective lenses. The path of light through such lenses and into the human eye is shown in cross-section at bottom. The earliest eyeglasses date to the 13th century. These diagrams were published in 'A Compleat System of Opticks' (1738) by English mathematician Robert Smith (1689-1768).

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Size: 3743px × 4722px
Photo credit: © ROYAL INSTITUTION OF GREAT BRITAIN/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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