Correction of Optical Defects: From Spectacles to Lasers - Professor William Ayliffe
4,828 views · Published 12 August 2011 · 1:01:41 · Indexed 12 November 2026
Channel: Gresham College · 2011 · Education
Despite sophisticated techniques; Laser, intraocular surgery and contact lenses; spectacles remain the most popular method for correcting optical defects of the eye. Roger Bacon (1266) proposed that convex lenses could be used for elderly people with failing sight, replacing crystals used for magnification. Printing exploded the need for spectacles and by the close of the 20th century amazing advances in surgery corrected vision defects. The transcript and downloadable versions of the lecture are available from the Gresham College website: http://www.gresham.ac.uk/lectures-and-events/correction-of-optical-defects-from-spectacles-to-lasers Gresham College has been giving free public lectures since 1597. This tradition continues today with all of our five or so public lectures a week being made available for free download from our website. http://www.gresham.ac.uk
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