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An unusual form of incomplete achromatopsia in a pair of siblings Atsushi Kandatsu 1 , Hiroshi Kitahara 1 , Kenji Kitahara 1 1Dep. of Ophthalmol., The Jikei Univ. Sch. of Med. pp.585-588
Published Date 1985/5/15
DOI https://doi.org/10.11477/mf.1410209423
  • Abstract
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We observed strong dyschromatopsia in a 9-year-old boy and his siter aged 5 years. Both manifested reduced visual acuity at 0.1 in either eye. No fundus abnormalities were present. They could not read any of Ishihara's plates except Nr. 1. They made over 400 errors on the Farnsworth-Munsell 100-hue test with a red-green axis. Spectral sensitivities of the brother at 4° temporally at scotopic levels were similar to the CIE scotopic curve. His spectral sen-sitivity at the fovea at photopic levels showed a reduced cone response in the long wavelength re-gion. It was higher than in protanomalies. The red-green settings of color matchings shifted towards red. Yellow settings showed a higher number than in protanomalous settings.

The findings indicate that the cases manifest a kind of incomplete achromatopsia with reduced ef-fective opitcal density of red and green cones.


Copyright © 1985, 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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