I was wondering how a uniform image is formed. If the eye is a point then I can visualize how an image is formed. But the eye isn't exactly a point. So don't light rays from all angles hit all spots on the retina? How is a uniform image formed? For example if we're looking in a plane mirror, we can see objects distinctly because there are only few rays connecting a point of the object to our eye whilst maintaining the laws of uniform reflection. But if the eye is extended then can't light rays from the ceiling and something in front of me reach the same point?