Vection is a term used to describe a type of optical illusion where the stationary object appears to move due to the movement of the observer's head or body. There are several other synonyms that are commonly used to describe this phenomenon, including visually-induced self-motion, sensory conflict, visual-vestibular conflict, and motion sickness. When individuals experience vection, they may exhibit symptoms such as dizziness, nausea, and disorientation. Understanding these synonyms and their relationship to vection can be helpful in more accurately describing and diagnosing associated conditions and disabilities or in developing treatments or interventions to alleviate these symptoms.