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Two Filter Method for Dark-Adaptation Measurements Mitsuo Ikeda 1 , Shuichiro Kaneko 1 , Masao Ohmi 1 1Imaging Science and Engineering Laboratory, Tokyo Institute of Technology pp.1199-1202
Published Date 1974/11/15
DOI https://doi.org/10.11477/mf.1410205201
  • Abstract
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Measurement of dark-adaptation curve nor-mally takes about half an hour to complete if one requires certain values necessary for clinics, such as the absolute thresholds for cones and rods, the transition point from cones to rods. To shorten the time we introduced the two filter method in which color filters of 560 nm and 510 nm were alternately inserted in the test flash. This provided different curve traces for cone-curve and rod-curve, and we could earsily find out the transition point from cones to rods, although the whole curve did not ne-cessarily show a clear dip called the Kohlrausch defelection point.


Copyright © 1974, 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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