Depth Perception - 3
	u Size Constancy l DEFINITION: seeing objects as a relatively constant size despite change in retinal image size. Sretinal image a 1/distance to object (a mean proportional to) Sperceived = Constant l Can be quite useful in object recognition u A Variation is Emmert’s Law for after effects Sretinal image = Constant Sperceived a distance l Also applies to depth generated by stereopsis