Answer: Ritalin along with other types of stimulants causes overactive eye movement.
Explanation: Stimulant is a form of drug used to increase temporary alertness and increased energy. Ritalin belongs to a group of stimulant called Methylphenidate, not only this but other stimulants such as cocaine, nicotine etc also cause overactive eye movement which is a condition in which a person is unable to give equal attention to multiple visual tasks at once.