Guidance for Industry. Retinoscope Guidance

摘要

A retinoscope is an AC-powered or battery-powered device intended to measure therefraction of the eye illuminating the retina and noting the direction of movement of the light on the retinal surface and of the refraction by the eye of the emergent rays. A retinoscope is intended to measure the refraction of the eye by illuminating the retina and noting the direction of movement of the light on the retinal surface and of the refraction by the eye of the emergent rays.