pupillometer
noun
pu·pil·lom·e·ter
ˌpyü-pə-ˈläm-ət-ər 
: an instrument for measuring the diameter of the pupil of the eye
Cite this Entry
“Pupillometer.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/pupillometer. Accessed 10 Jul. 2025.
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