Scientists have begun studying films to learn more on perception. A vision scientist, Tim Smith, collected data from 75 people by monitoring them while they watch Iron Man 2. Using cameras to track their eye movements and a heat map, Smith is able to find where their attention goes most. After collecting his data, Smith presented it to Jon Favreau, director of Iron Man 2. Favreau stated that "everything you're looking at is real, and everything you're not looking at is fake." Because of how the brain interprets information, simple backgrounds can be created with CGI. Brains take in separate bits of information then merges them together as one whole. "The best visual effects tool is the brains of the audience", claims Favreau.
This article helped me learn to use perception to my advantage and that some things can be too complex to capture the realism of live acting. The use of manipulation of the eye is very useful for the animation field and I think especially 3D animation for its tendency to be more realistic than the classic 2D styles.