The researcher describes how an optical illusion and error is the result of perception and cognition is one of the topics of General Psychology who cares directly disclose senses when human and interpretation received through the experiences of perception and there is a difference between sensation and perception, and the first of the comparison between Aristotle, Ibn Sina, Alfarba address this definition of visual perception and its relationship to direct visual also build the eye and its relationship making tricks may Allah Almighty word sight as a tool of sense and what respect here the sense of the eye and its importance in humans, and this tool visual is the engine for the understanding of the during visual stimulation when receiving eye to light and said the researcher how important verses of the eye and retina important absorbs light rays and translate them to electronic signals to the brain also addressed Find outlook diverse appointed one and that interaction in humans does not affect the original in humans, as well as the outlook both eyes eating also search visual perception and includes three steps: 1. Make color, 2. photo on the retina, 3. crossing the impulses to the brain