(1) SYN: pupillary reflex. (2) a red glow reflected from the fundus of the eye when a light is cast on the retina, as in retinoscopy; SYN: eye reflex, fundus reflex. (3) a triangular area at the anterior inferior part of the tympanic membrane, extending from the umbo to the periphery, where there is seen a reflection of light. SYN: cone of light, Politzer luminous cone, pyramid of light, red reflex, Wilde triangle.