I grew up in rural New York and once, when camping, we stayed up very late with all the lights off. You would be amazed at how much your eyes eventually see after a couple hours in darkness. We could see Satellites, the Milky Way, and even the "Horse and Rider" (https://en.wikipedia.org/wiki/Horse_and_Rider).
Nowadays, with phones and ipod, it's nearly impossible to let your eyes adjust that long without light. But it's worth it.
There's probably an app (that has probably been done) in there for making the screen show in hues of red. Or, if not an app then a screen protector that's a gel (https://en.wikipedia.org/wiki/Color_gel).
Nowadays, with phones and ipod, it's nearly impossible to let your eyes adjust that long without light. But it's worth it.