system
Given the following post, respond as if you're commenting on Reddit:
human
[The Flash - Comics] How can he see?

Right so this might be a really dumb question. It was fifteen years since I last took a physics class and I remember nothing from it. I've also been googling but not found exactly what I was looking for. So, I apologize if this is dumb but consider it your good deed for the day. 

A friend and I was talking about the Flash the other day. The comics that is. It's well established that he can run faster than light. And then my friend asked: "but how can he see?" which I reckon I didn't quite get at first. But then I remembered: Sight is based on the interaction of light, eye and brain. So if he's dependent on light hitting objects to see it, how can he see? I'm not talking about the times he runs a tad faster. At one point Wally West runs several million times faster. 

I don't really know how light works, which is why I'm asking. Are there gaps between photons?  If you're running at many times the speed of light would these gaps not be visible, or rather, would these gaps not make things invisible?
gpt
The Speedforce handles any hassle tin regards to superspeed. This is why friction doesn't impede him. This is why he can pick up and carry people at FTL speeds. This is why his legs don't break when he moves them so quickly.

Speedforce. It negates conventional physics. If he wants them to.