Main Entry: oph·thal·mo·scope

Pronunciation: \äf-ˈthal-mə-ˌskōp\

Function: noun

: an instrument for viewing the interior of the eye consisting of a concave mirror with a hole in the center through which the observer examines the eye, a source of light that is reflected into the eye by the mirror, and lenses in the mirror which can be rotated into the opening in the mirror to neutralize the refracting power of the eye being examined and thus make the image of the fundus clear

—oph·thal·mo·scop·ic \-ˌthal-mə-ˈskäp-ik\ adjective

—oph·thal·mo·scop·i·cal·ly \-i-k(ə-)lē\ adverb