[Case of unilateral impairment of short-wavelength sensitive cone with sudden onset].
BACKGROUND
Compare to either the middle or the long cones, short cones (S-cone) are easily damaged.


METHODS
A 62 year-old men complained of acute tritan OS. The corrected visual acuity was 1.2 OU. Routine ocular examinations showed no remarkable abnormalities, but we detected impaired responses using S-cone ERG and blue-on-yellow perimetry OS. We diagnosed this case as acute damage of the blue cone.


CONCLUSIONS
S-cone damage can be determined by electro-physiological and psychophysical examinations in cases of unilateral color abnormality.
Okuno
Takashi
T
Department of Ophthalmology, Korigaoka-yukeikai Hospital, Miyanoshita-cho, Hirakata-shi, Osaka-fu 573-0046, Japan. takashi@poh.osaka-med.ac.jp
Minami
Masahiro
M
Oku
Hidehiro
H
Sugasawa
Jun
J
Ikeda
Tsunehiko
T
D000208:Acute Disease; D003117:Color Vision Defects / Q000175:diagnosis* / Q000503:physiopathology; D003941:Diagnostic Techniques, Ophthalmological; D006801:Humans; D008297:Male; D008875:Middle Aged; D011846:Radio Waves; D017949:Retinal Cone Photoreceptor Cells; D014792:Visual Acuity