Fooled by depth
Ames room
Which person is taller?
They are about the same size, though one looks like a giant and the other tiny.
Why? The room isn’t square: one corner is much farther away than the other, but the walls and floor are shaped so it looks normal through the peephole. Your brain trusts the room and changes the people instead.
Picture: mosso, CC BY 2.0 · Wikipedia(opens in a new tab)