A bionic eye would have to receive photons and translate them into an electrical impulse. No big deal there.
But it has to more or less duplicate the signal that was being sent to the brain by the living eye. And it has to do it in a very, very small space in real time.
A prototype for a new bionic eye.
So first you have to figure out what a human eye does when it signals the brain and do the same thing. (This doesn’t have to be exact. The mind can adjust almost magically to deal with different input.)
You have to re-connect all the eye muscles so that the person has the capability to move the eye. (human eyes move constantly and we cannot see if our eyes cannot move.)
Because it’s moving all the time, it cannot irritate the eye cavity in any way and it has to not be rejected by the body’s immune system.
It’s all doable, but it’s technically very difficult.
