a record of the changes in electrical potential that occur between the front and back of the eyeball as the eyes move between two fixed points: used to detect retinal dysfunction. Abbreviation:EOG
Main Entry: elec·tro·oc·u·lo·gram Pronunciation: i-"lek-trO-'äk-y&-l&-"gram Function: noun : a record of thestanding voltage between the front and back of the eye that is correlated with eyeball movement (as in REM sleep) and obtained by electrodes suitably placed on the skin near the eye
[i-lek-troh-ok-yuh-luh-gram] 
troʊˈɒk