Hand held instrument used to obtain an objective assessment of a patient`s refractive condition (their prescription)
instrument for measuring and viewing the retina
<instrument> An optical device used to illuminate a subject's retina during retinoscopy. ... Origin: retino-+ G. Skopeo, to view ... (05 Mar 2000) ... 
(ret´ĭ-no-skōp″) skiascope; an instrument used in retinoscopy.
Type: Term Pronunciation: ret′i-nō-skōp Definitions: 1. An optic device used to illuminate a subject's retina during retinoscopy.
retinoscope, skiascope 1. An optical device used to illuminate a subject's retina during retinoscopy. 2. 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.