In undertaking this analysis of cases of ametropia, in which the error had been determined one or more times after the lapse of several years from the time of the first determination, and in which correcting glasses had been worn, I was actuated by a desire to see whether some unformulated belief which I possessed, and which I had nowhere seen expressed, would be borne out by facts. Further, as so little is said in text-books on ophthalmology and on refraction, and as some of the things which are said are not in accord with my unsubstantiated views I wished to clear my mind of the uncertainty. Quotations from some of the standard text-books and from the writing of several authorities will here be given that a comparison may be made between the views there expressed and conclusions reached as the result of this analysis. A perusal of the chapter
ZENTMAYER W. CHANGES OCCURRING IN THE REFRACTION OF CORRECTED AMETROPIC EYES. JAMA. 1911;LVII(6):470–474. doi:10.1001/jama.1911.04260080034010
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