Is it true that when you look at your iPhone it ruins your eyesight? What about at night?

Is it true that when you look at your iPhone it ruins your eyesight? What about at night? - 1

Its always good to look away and refocus and blink no matter what you do, you could stare at a sheet of paper 8 hours a day when its 2 inches in front of your nose and I'm sure thats probably bad for you also.

No and no.