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To the Editor:—In my article on "Vitamin D and Myopia" in the January issue of the Archives (19:47, 1938), I stated that I knew of no experiments to determine the amount of calcium in normal and pathologic scleras. There has now come to my attention an article entitled "Myopia and Calcium Metabolism" by Dr. J. Strebel, appearing in the Klinische Monatsblätter für Augenheilkunde (99:325 [Sept.] 1937). Strebel states that he showed in an earlier article that the sclera of the human eye with normal vision contained 3 per cent of calcium. He also reports 4 cases of myopia, in each of which the myopia developed after the twenty-fifth year together with disturbances of the calcium metabolism.
Laval J. VITAMIN D AND MYOPIA. Arch Ophthalmol. 1938;19(4):612. doi:10.1001/archopht.1938.00850160138010
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