Selective abnormality of the cone B-wave in a patient with retinal degeneration.
A 44-year-old woman with midperipheral pigmentary changes that resemble retinitis pigmentosa (RP) is described; unlike typical patients with RP, her photopic b-wave was markedly attenuated as compared with her photopic a-wave. Otherwise, her electroretinogram (ERG) was typical of patients with early stages of photoreceptor degeneration. Scotopic and photopic a-wave amplitudes were reduced about 50%; her scotopic b/a appeared normal.
D000222:Adaptation, Physiological; D000328:Adult; D003623:Dark Adaptation; D004596:Electroretinography; D005260:Female; D006801:Humans; D008027:Light; D010775:Photic Stimulation / Q000379:methods; D010786:Photoreceptor Cells / Q000503:physiopathology*; D012162:Retinal Degeneration / Q000503:physiopathology*