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To the Editor:
—I wish to point out that what Dr. Verhoeff terms fallacies in my argument regarding the production of cataract is in reality a misinterpretation or a misunderstanding of that argument.He states that my assumption that senile cataract is due to a modification of the lens protein in such a way that ultraviolet radiation can precipitate it and hence produce cataract "is sufficiently controverted by the fact that senile cataract usually begins below where the lens is protected by the iris from radiations of all wave lengths." So far as I have been able to learn from ophthalmologists in this country and by correspondence from ophthalmologists in India, where senile cataract is of comparatively frequent occurrence, I do not think that Dr. Verhoeff's sweeping statement that "senile cataract usually begins below where the lens is protected by the iris from radiations of all wave lengths" is confirmed.
Burge WE. Radiant Energy and Cataract. JAMA. 1915;LXIV(15):1264–1265. doi:10.1001/jama.1915.02570410062036
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