Conclusions
Automated alternate cover test by VOG offers an objective and quantitative skew measurement and proved to be accurate in measuring vertical eye misalignment. Precision was moderate, which mandates a sufficient number of tests per subject. VOG could serve in the future as a quantitative, complementary test for the ACT with prism, thus allowing for its use not only by experts but also by non-experts. Furthermore, it could be used as a future point-of-care diagnostic test for patients with an acute vestibular syndrome in the ED.