Hippus is a medical term that is often used to describe rapid and involuntary eye movements, which can be an indication of neurological or developmental disorders. Synonyms for hippus include nystagmus, which specifically denotes jerky and oscillatory eye movements that can occur both horizontally and vertically. Other synonyms for hippus include ocular flutter, which refers to rapid horizontal eye movements, and opsoclonus, which is characterized by irregular and chaotic eye movements in all directions. Understanding these various synonyms for hippus can help doctors and healthcare professionals better diagnose and treat patients with eye movement abnormalities.