Optical Illusions related to Perception

Optical Illusions

Old Woman…Or Young Girl?
hint: the old woman’s nose is the young girl’s nose and chin

A Rabbit…. Or A Duck?
hint: the duck is looking left, the rabbit is looking right

Man Playing Horn… Or Woman Sillhouette?

Two Faces… Or One?
Woman In Vanity… Or Skull?
hint: move farther a bit from the screen and blink to see the skull or the woman (looking at the mirror)

Is The Book Looking Towards You… Or Away From You?