Stop squinting
April 6, 2006 9:13 AM
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Antique SpectaclesDavid Fleishman, M.D., a retired ophthalmologist, has compiled a rather extensive collection of information about spectacles and their importance in history. In addition to many examples of early spectacles and information about the spectacles worn by figures in history, there is a general history -
Eyeglasses Through the Ages:
[R]eading glasses are one of the most important inventions of the past 2000 years.... No one really knows about the early history of image magnification. In ancient times, someone noticed that convex-shaped glass magnified images. Sometime between the year 1000 and 1250 crude technology began to develop regarding reading stones (simple magnifiers). English Franciscan Friar Roger Bacon (1220 -1292), in his 1268 ‘Opus Majus’, noted that letters could be seen better and larger when viewed through less than half a sphere of glass. Bacon's experiments confirmed the principle of the convex (converging) lens, described by Alhazen (965-1038) Arabian mathematician, optician and astronomer at Cairo, and even earlier by the Greeks.
(via the dead tree version of the WSJ)
posted by caddis (18 comments total)
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posted by caddis at 9:20 AM on April 6, 2006