Not only that. It really helps your eyes to look at other things and more importantly, at things at different distance.

Plenty of studies for that, too.

(not strictly for "outside" though, you can also look out of the window regulary, it is so that your eyes refocus and relax )

Do you have a source? Everything I've read gave me the impression that we only have strong evidence that outdoor time is a factor, and the light exposure explanation is just a hypothesis.