The technique of measuring and recording the electrical responses of the eye's retina when exposed to light.
From electro- + retino- + -graphy (act of recording or writing, from Greek graphia). Developed in early 20th-century ophthalmology.
Electroretinography revolutionized eye disease detection because it measures the retina's actual electrical response to light—meaning doctors can spot problems in the millions of light-sensing cells before vision loss becomes obvious.
Complete word intelligence in one call. Free tier — 50 lookups/day.