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September 1973

Date Mistake-Reply

Author Affiliations

Washington, DC

Arch Ophthalmol. 1973;90(3):261. doi:10.1001/archopht.1973.01000050263022

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Reply to Professor Grom  Professor Grom is correct. The date and syntax should have been as follows: "His main source was a work written about 1270 by Witelo and republished (by others) in the 16th century." (If Witelo had been able to do his own republishing at that time, he would deserve a longer essay than Kepler.) Witelo's thesis was published by itself in Nuremburg in 1535 and in a second edition in 1551. However, Kepler almost certainly used the Basel edition of 1572, in which Witelo's monograph was combined with Alhazen's Opticae thesaurus libri septem.In tracing the growth of an idea, one can sometimes see hands grasping for the idea and just miss grabbing hold. Maurolico of Messina recognized that double convex lenses converge light rays and that double concave lenses diverge them. He applied the analogy to the lens of the eye, explaining nearsightedness and farsightedness as

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