Well, it all depends on several factors to be honest. Actually, in the past, TV set will give out a lot of harmful lights and radiation which would definitely harm your eyes to a large extent. However, with the development of technology, current TV sets are much more healthier than those in the past. Also, the distance between you and the TV set plays an important role. Meantime, you should know whether the TV is suitable for computer use. If the answers are satisfactory, you are ok to do so. Good luck.