Hello Concussion is a type of head injury caused by sudden acceleration and deacceleration forces. The symptoms which you have quoted are blurring of vision, nausea and dizziness These symptoms along with the type of injury you have told indicate atleast minor form of head injury. These symptoms require further evaluation by investigations like CT scan to rule out head injury and treatment depending on the findings of the investigations. So please do consult your surgeon or nerosurgeon for further evaluation and treatment. Thank you