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Presbyopia (farsightedness associated with the aging of the eye) was the first refractive error corrected by optical aids. Alhazen [Ibn Al Haitham, (965–1040)] was the first to initiate the treatment by using “reading stones.” The first efficient bifocal glasses for presbyopes, which corrected near and far vision in one frame, were invented by the American statesman, Benjamin Franklin (1706–1790).

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Franklin. From Reading Stones to Bifocals

  • 章节

  • 发表日期：

    2025年

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  • Sibylle Scholtz,
  • Myriam Becker,
  • Lee MacMorris,
  • Achim Langenbucher

摘要

Presbyopia (farsightedness associated with the aging of the eye) was the first refractive error corrected by optical aids. Alhazen [Ibn Al Haitham, (965–1040)] was the first to initiate the treatment by using “reading stones.” The first efficient bifocal glasses for presbyopes, which corrected near and far vision in one frame, were invented by the American statesman, Benjamin Franklin (1706–1790).