A scientific instrument used to measure the sensitivity of the eye to different colors and hues.
From Greek 'chroma' (color), 'optos' (visible/seen), and 'meter' (measure). This specialized device emerged in the 19th century as scientists sought precise ways to study color vision.
Doctors use chromatoptometers to test whether someone can distinguish between colors properly, catching color blindness or certain diseases before they cause real problems. It's like a color-vision lie detector!
Complete word intelligence in one call. Free tier — 50 lookups/day.