The following images are examples from Gestalt psychology which speak to perspective.
What do you see when you look at these images? (Ponder these images before reading the text below, which gives some hints.)
The top picture may be seen alternatively as an old hag, or a young woman. (The hag’s nose becomes the young woman’s jawline as she faces away from the viewer).
The second picture can be seen alternately as a duck or a hare. (The duck’s beak becomes the hare’s ears.)
What do you see when you look at this?