ophthalmograph

noun

oph·​thal·​mo·​graph äf-ˈthal-mə-ˌgraf, äp- How to pronounce ophthalmograph (audio)
: an instrument that photographs the movements of the eyes during reading

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“Ophthalmograph.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/ophthalmograph. Accessed 23 Mar. 2023.

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