Which perceptual illusions involve size constancy?

Question

Quizplus · Accepted Answer

Both the moon illusion and the Müller-Lyer illusion involve size constancy. The moon appears larger when it is near the horizon because the context of the surrounding objects makes it seem farther away and thus smaller, but our brain interprets it as being the same size as when it is above us in the sky. The Müller-Lyer illusion involves two lines of the same length, but with opposite arrowheads, causing one line to appear longer than the other. This illusion tricks our brain into perceiving size based on the relative distance of the lines instead of their actual length.

Which Perceptual Illusions Involve Size Constancy