The document discusses electronystagmography (ENG), which tests eye movements using electronic recordings. It lists the main tests done with ENG, including gaze tests, optokinetic nystagmus tests, positional tests, and caloric tests. The caloric test induces nystagmus using temperature changes to evaluate vestibular system function. The document also lists various eye movement findings that can be detected through ENG testing, such as nystagmus, dissociations, dysrythmias, and positional nystagmus.