I use it myself and recommend it to others -> OcuShield
There is a protection shield you can order online as well as for computer use. I recommend for you purchase these pairs of blue light-blocking eyes wears. I wear the light-colored one for day use and an amber-colored one (darker) for evening use. It definitely improves the quality of your sleep and avoids having the unknown cause of headaches, fatigue, and moodiness.
f.lux You will see the color of the screen change to light peach color when the sun goes down! Good for your eyes and brain!
And block blue light emission from your iPhone, please follow this step!
