By fatiguing opponent cells, after images of the opponent color are created.
Perception is selective-it picks one interpretation of a sensation and rejects all others.
The brain selects a figure against the ground . The brain groups together elements to make a whole. The brain exploits the cues or hints about depth present in the world, called depth cues . You need both eyes to have retinal disparity. The brain takes the two disparate retinal images and fuses them into one and depth is the perceived result.