nystagmography
/ˌnʌɪstaɡˈmɒɡrəfi/ /ˌnɪstaɡˈmɒɡrəfi/Medicine
noun
The measurement and recording of nystagmic movements of the eyeball.
Origin
1920s; earliest use found in Journal Industrial Hygiene & Toxicology. From nystagmus + -ography, after German Nystagmographie.