What are the effects of watching too much tv/media such as cell phones ipad computer etc? can you go blind from too much and what is eye fatigue?

Too much LED: Watching too much led light is not going to make you go blind. However, it can cause your eye muscles to get tired, just as if you exercised for hours and your leg muscles got tired. That is eye fatigue. However, recent studies do show excessive looking at led light can decrease melatonin levels in your body, which can adversely affect your sleep and cause insomnia and poor sleep.

Blind?: Of course not. Just eye strain/headache. Eye fatigue is when the focussing muscle gets tired. Thats all.

You wont go blind...: Many patients complain of blurred vision or discomfort after staring at a cell phone, ipad, computer, or even television. The reality is that the blink rate diminishes and affects the ocular surface. When tears evaporate, the irregularities of the ocular surface are exposed and leads to the transient blurring of vision. You wont go blind, but you may experience symptoms of dry eye syndrome.