Electrophysiologic studies in birdshot chorioretinopathy.
We investigated retinal function in 16 patients with birdshot chorioretinopathy. Consistent abnormalities of dark adaptation, color vision, visual field, electro-oculography, electroretinography, and visual-evoked cortical potentials were found. They included raised thresholds of dark adaptation, acquired dyschromatopsia, mainly of the blue-yellow type, an electroretinogram with reduced amplitude, increased latency of the b-wave and absent oscillatory potentials, an abnormal electro-oculogram, and in many a marked disturbance in the pattern reversal visual-evoked cortical potential. The a-wave of the electroretinogram, the fast oscillations of the standing potential, and the flash visual-evoked cortical potential were well preserved. The nature of the abnormalities suggests that dysfunction was caused by inner retinal disease. Little evidence indicated outer retinal dysfunction resulting from choroidal inflammation.
Priem
H A
HA
Department of Ophthalmology, University of Gent, Belgium.
De Rouck
A
A
De Laey
J J
JJ
Bird
A C
AC
D000328:Adult; D000368:Aged; D002829:Choroid / Q000503:physiopathology*; D003118:Color Perception; D003623:Dark Adaptation; D004585:Electrooculography; D004594:Electrophysiology; D004596:Electroretinography; D005074:Evoked Potentials, Visual; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012164:Retinal Diseases / Q000503:physiopathology*; D012607:Scotoma / Q000503:physiopathology; D014603:Uveal Diseases / Q000503:physiopathology; D014792:Visual Acuity; D058609:Visual Field Tests