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Japanese

Dependence of Visual Acuity upon the Angle between the Optotype and Line of Vision Shinichi Shindo 1 pp.792-797
Published Date 1966/5/15
DOI https://doi.org/10.11477/mf.1410203441
  • Abstract
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Maximal visual acuity is obtained when the optotype is observed from the front, i.e.when the angle between the plane of opto-type and the line of vision is 90 degrees. The apparent visual acuity becomes particularly poorer when the angle becomes less than 62.5 degrees, probably due to the abnormal refrac-tion of light from the optotype. Due conside-ration of above phenomenon is necessary in placing the seats of students is schools, is selecting the right kind of blackboard to be used and in the determination of proper lightening of school-rooms.


Copyright © 1966, 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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