It sounds crazy, but it's really possible to lead to blindness because watching too much TV. In fact, watching too much TV is harmful to you and your eyes, because we all know that while watching, we have to see TV for a long time without rest, then your eyes will become tired and this will reduce your eye vision and you will gradually develop into heavy prescription, which nobody want to have. You will not go blind in a short time, but for long terms and too much radiation, I think it is hard to say whether or when the damage to your eyes would make you blind. As far as i am concerned, you can surely take the TV as a way to relax yourself, but when you watch it for a long time, you should stop it and make your eyes watch the distance so that you and your eyes have a good rest. An eye exercise to relax the the eyes is also a effective way. Eyes are very important to everyone. Thus you have to treasure it.