How to prevent my eyes from hurting while staring at a small screen?

So my friend got me hooked today on pretty little liars and i've been watching it All day on netflix on my iphone. Anyway, since i've been staring at a small screen for like the entire day (with breaks for meals) my eyes are starting to hurt, like they are straining. I really want to finish the season but without my eyes hurting. How can i prevent this? I can't watch it anywhere other than my phone, as in i don't have any access to bigger screens like a tv or computer at the moment. So what should i do about my eyes?

Your eyes hurting is your body's way of telling you to stop! The best thing you can do is to take breaks. Look away from your screen for 10 minutes or more. Even looking away from a minute will help a lot. Give your eyes a break and don't strain or over work them. Once you damage them, you can't fix them.