I'm wondering how it's possible for vertebrates like us to see so well, or at all, if our photoreceptors are actually pointed away from the light focused on the retina. I would assume that the light would just pass right by the photoreceptors and we wouldn't be able to see much except for the presence or absence of light. The fact that photoreceptors are pointed away from the light seems like it wouldn't allow for good vision similar to how you can't see the sun if your head is turned away from it. Yet it works for us and many other vertebrates with even better vision but the same design. How?