pupillometer

noun
pu·​pil·​lom·​e·​ter | \ ˌpyü-pə-ˈläm-ət-ər How to pronounce pupillometer (audio) \

Medical Definition of pupillometer

: an instrument for measuring the diameter of the pupil of the eye

Other Words from pupillometer

pupillometry \ -​ə-​trē How to pronounce pupillometry (audio) \ noun, plural pupillometries