> I don't find the TFA explanation convincing; it's too abstract. ...meaning you didn't understand it. It may not be a good explanation, but the problem isn't

> I don't find the TFA explanation convincing; it's too abstract. ...meaning you didn't understand it. It may not be a good explanation, but the problem isn't that it's too abstract. > If you see something moving in your left eye, the best way to swim away is to send a signal for a muscle contraction in your right side, which will cause you to curl and swim to the right. So the best wiring is a direct connection from left eye to right side, and right eye to left side. The brain is built up starting from that kind of connection. If your fish only contracts the right side of it's body, that's not going to create effective motion, and while your fish is having the seizure you've described, it's going to get eaten. Even if there were some sort of direct eye-to-muscle connection (which there isn't) the left eye would connect to the right side of the brain, which would then connect to the left side muscle, so you'd have left eye to left muscle (via the brain), not left eye to right muscle.