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On Definitions of Blindness and Amblyopia Noburo Oyama 1 , Shigeo Shinya 1 1Ophthalmological Clinic of Nihon University pp.50-52
Published Date 1955/1/15
DOI https://doi.org/10.11477/mf.1410202068
  • Abstract
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In the present age of compulsory education system for the blind, the lack of definitions of blindness and amblyopia have grievously been felt. In response to the demand, the authors have researched many definitions and views home and abroad, and compared them with one another.

In England and U.S.A. the sight 20/200 or less with correction is defined as blindness, while 20/70 as amblyopia. In Japan, however, the border-line, of blindness has been marked on 0.02 and that of amblyopia on 0.3.


Copyright © 1955, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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