The NIH-ERG ganzfeld stimulator.
The design specifications of a NIH-ERG ganzfield stimulator is discussed. Based on a proposed standard for clinical electroretinography, the stimulator uses stroboscopic stimuli as a whole field flash. But by varying the parameters of wavelengths and background illumination, a complete isolation of the rods and cone systems of the retina is obtained. This information is invaluable at times in early detection and diagnosis of retinal dysfunctions.
D003937:Diagnosis, Differential; D004558:Electric Stimulation; D004594:Electrophysiology / Q000295:instrumentation; D004596:Electroretinography / Q000295:instrumentation*; D005069:Evaluation Studies as Topic; D006801:Humans; D010786:Photoreceptor Cells / Q000502:physiology; D012164:Retinal Diseases / Q000175:diagnosis*; D014172:Transillumination / Q000295:instrumentation