Clinical outcomes and aetiology of fourth cranial nerve palsy with acute vertical diplopia in adults

We investigated the clinical outcomes of fourth cranial nerve (CN4) palsy with acute vertical diplopia in adults. A total of 80 patients with acute CN4 palsy who underwent at least 3 months of follow-up were included in this study. We retrospectively investigated the aetiology, rate of recovery, and factors associated with recovery between March 2016 and January 2019. The average age of patients with CN4 palsy was about 60 years, and the...