How do you know the difference between your eye

Info icon This preview shows pages 7–9. Sign up to view the full content.

View Full Document Right Arrow Icon
How do you know the difference between your eye movements and motion? Try jiggling your eye… Two situations that Lead to real motion perception and one that does not 1. An object moves, and the observer is stationary. Movement creates an image that moves on the observer’s retina. 2. An object moves, and the observer follows the object with his or her eyes. Movement is tracked so that the image is stationary on the retina. 3. An observer moves (eyes) through a stationary environment. Image of environment moves across retina but environment is perceived as stationary.
Image of page 7

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
5/22/2013 8 1. object moves, observer stationary (see motion) 2. object moves, observer follows (see motion) 3. Objects stationary, observer moves (don’t see motion) D. Eye movements: Perceiving vs. Producing motion D. Eye movements: Perceiving vs. Producing motion D. Eye movements: Perceiving vs. Producing motion Why don’t our eye -movements produce a perception of motion? Corollary discharge theory - movement perception depends on three signals Motor signal (MS) - signal sent to eyes to move eye muscles Corollary discharge signal (CDS) - split from the motor signal Image displacement signal (IDS) - movement of image stimulating receptors across the retina
Image of page 8