[mtg]

No one understands how the brain translates nerve impulses from the eye into what we see. That functionality is well beyond our comprehension. So it makes me wonder, which evolved first?

The eye and it's optical nerve system leading to the brain - and then the part of the brain that evolved so it could interpret the signals.

Or, the part of the brain that was waiting for the eye and the optical nerve system to evolve and connect to it, so it could translate the signals from the eye into useful information.

[GodGunsGuts]

Or perhaps they are both part of an integrated system that were created to function together right from the start.