Cephalopod eyes are better than mammalian ones. They evolved independently, but cephalopods ended up with an arguably "better" solution, and mammals aren't about to swap their eyes around entirely given that their eyes work just fine, even with a blindspot.

https://en.wikipedia.org/wiki/Cephalopod_eye

> In vertebrate eyes, the nerve fibers route before the retina, blocking some light and creating a blind spot where the fibers pass through the retina. In cephalopod eyes, the nerve fibers route behind the retina, and do not block light or disrupt the retina.