ophthalmoscope

(of-thal’mo-skop) [Gr. ὀρθαλμός eye + σκοπεῖν to see]. A perforated mirror used in inspecting the interior of the eye. ghost o., a form in which a portion of the reflected rays are deflected by a mirror. ring’s 0., an ophthalmoscope with tilting mirror, complete disk of lenses, and supplemental quadrant of lenses.