photopsin pho·top·sin (fō-tŏp’sĭn)
The protein component of the pigment iodopsin in the cones of the retina of the eye.
photopsy pho·top·sy (fō-tŏp’sē) n. See photopsia.
photoptarmosis pho·to·ptar·mo·sis (fō’tō-tär-mō’sĭs) n. Reflex sneezing in response to bright light striking the retina.
photoradiation pho·to·ra·di·a·tion (fō’tō-rā’dē-ā’shən) n. A treatment for cancer in which an individual is injected with a photosensitizing agent and the cancerous tissue is exposed to visible light, often by means of a fiberoptic probe. Also called photochemotherapy.
- Photoradiation therapy
photoradiation therapy n. Photoradiation.