title: [Case of unilateral impairment of short-wavelength sensitive cone with sudden onset].
abstract: 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.
authors.affiliation: Department of Ophthalmology, Korigaoka-yukeikai Hospital, Miyanoshita-cho, Hirakata-shi, Osaka-fu 573-0046, Japan. takashi@poh.osaka-med.ac.jp
authors.forename: Takashi
authors.initials: T
authors.lastname: Okuno
authors.forename: Masahiro
authors.initials: M
authors.lastname: Minami
authors.forename: Hidehiro
authors.initials: H
authors.lastname: Oku
authors.forename: Jun
authors.initials: J
authors.lastname: Sugasawa
authors.forename: Tsunehiko
authors.initials: T
authors.lastname: Ikeda
mesh_terms: 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