retinoscope

[ ret-n-uh-skohp ]
/ ˈrɛt n əˌskoʊp /

noun Ophthalmology.

an apparatus that determines the refractive power of the eye by observing the lights and shadows on the pupil when a mirror illumines the retina; skiascope.

Origin of retinoscope

Medical definitions for retinoscope

retinoscope
[ rĕtn-ə-skōp′ ]

n.

An optical instrument for examining refraction of light in the eye.