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Japanese

A new lantern test using light-emitting diode lamps Shoko Tanabe 1 , Kaitiro Hukami 2 , Shinichi Yamade 3 , Kazuo Ichikawa 4 , Shigeo Tagai 1Dept of Ophthalmol, Jpn Red Cross Nagoya First Hosp 2Dept of Ophthalmol, Fukui Med Sch 3Dept of Ophthalmol, Shiga Univ of Med Sci 4Dept of Ophthalmol, Chukyo Hosp pp.1767-1770
Published Date 1993/10/15
DOI https://doi.org/10.11477/mf.1410901850
  • Abstract
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We designed a new lantern test incorporating light-emitting diode lamps. It is named as JFC and is a modification of Ichikawa's lantern. The present system has the following features as compared with Ichikawa's. Greens and yellows are brighter and more saturated. All the test lights are of equal luminance. Combination of the colors of test lights has been modified so that the three colors appear in equal condition. The nine sets of test lights are presented in random sequence. In anomalous tri-chromats, the errors in one trial with 9 sets of lights averaged 3.4 for JFC and 5.4 for Ichikawa's. In dichromats, it averaged 7.0 both for JFC and Ichi-kawa's. The criteria for passing and failing have not been determined as yet.


Copyright © 1993, 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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