眼电图

electrooculograph (EOG)

eye / small hole / crux (of a matter) / CL:隻|只[zhi1],雙|双[shuang1] / classifier for big hollow things (wells, stoves, pots etc)

lightning / electricity / electric (bound form) / to get (or give) an electric shock / phone call or telegram etc / to send via telephone or telegram etc

diagram / picture / drawing / chart / map / CL:張|张[zhang1] / to plan / to scheme / to attempt / to pursue / to seek