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About: Electroretinography     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatEyeProcedures, within Data Space : dbpedia.org associated with source document(s)

Type: Thingyago:Abstraction100002137yago:Act100030358yago:Activity100407535yago:Engagement101239064yago:Event100029378yago:GroupAction101080366yago:Intervention101240210yago:Procedure101023820yago:PsychologicalFeature100023100yago:YagoPermanentlyLocatedEntityyago:WikicatEyeProcedures New Facet based on Instances of this Class

Electroretinography measures the electrical responses of various cell types in the retina, including the photoreceptors (rods and cones), inner retinal cells (bipolar and amacrine cells), and the ganglion cells. Electrodes are placed on the surface of the cornea (DTL silver/nylon fiber string or ERG jet) or on the skin beneath the eye (sensor strips) to measure retinal responses. Retinal pigment epithelium (RPE) responses are measured with an EOG test with skin-contact electrodes placed near the canthi. During a recording, the patient's eyes are exposed to standardized stimuli and the resulting signal is displayed showing the time course of the signal's amplitude (voltage). Signals are very small, and typically are measured in microvolts or nanovolts. The ERG is composed of electrical pote