Old Woman...Or Young Girl?

hint: the old woman's nose is the young girl's nose and chin

Two Faces... Or One?

A Rabbit.... Or A Duck?

hint: the duck is looking left, the rabbit is looking right

A Face Of A Native American... Or An Eskimo?

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)