Electroretinography test - definition

Electroretinography test - definition

Electroretinography is a test that measures the electrical activity of the RETINA’s rods and cones in response to light stimulation. The ophthalmologist places anesthetic drops in the EYE to numb it, then attaches an electrode to the surface of the CORNEA. The electrode detects electrical impulses on the retina when the ophthalmologist flashes a beam of light onto the retina, and sends signals to the electroretinograph machine. An electroretinogram is the recording the machine makes of the retina’s responses. Electroretinography helps diagnose disorders of the retina such as RETINAL DETACHMENT and RETINITIS PIGMENTOSA.

See also DARK ADAPTATION TEST; RETINOPATHY; SLIT LAMP EXAMINATION.

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