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Case Reports
. 2012 Aug;125(1):75-80.
doi: 10.1007/s10633-012-9329-y. Epub 2012 May 20.

A case of bilateral, acquired, and acute dysfunction of short-wavelength-sensitive cone systems

Kazuki Kuniyoshi  1 , Hiroyuki Sakuramoto, Akira Nakao, Sonoko Takada, Yoshikazu Shimomura
Affiliations
Case Reports

A case of bilateral, acquired, and acute dysfunction of short-wavelength-sensitive cone systems

Kazuki Kuniyoshi et al. Doc Ophthalmol. 2012 Aug.

Abstract

To report a case of bilateral, acquired, and acute dysfunction of short-wavelength-sensitive (SWS) cone systems. The case was a healthy 39-year-old man. He noticed sudden onset of bilateral abnormal color vision. Ophthalmic examinations revealed normal fundi in both eyes. Farnsworth panel D-15 test and Farnsworth-Munsell 100-hue test showed tritanopia. White-on-white static perimetry showed no abnormality; however, blue-on-yellow static perimetry detected remarkably reduced sensitivity at the lower visual field in both eyes. ISCEV-standard full-field electroretinograms (ERGs) were normal; however, blue-on-yellow ERGs showed reduced amplitude of b-wave that was derived from SWS cone systems in both eyes. He was observed for 1 year, and no improvement in color vision was found during the observation. This is a unique case which showed bilateral, acquired, and acute dysfunction of SWS cone systems. The cause of the acquired tritanopia remains to be known.

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