Well, it seems that you are very careful of your eyes, which are of great importance to all of us. Anyway, it is true that by watching too much TV shows on a plasma TV set, our eyes would be slightly damaged, which need some breaks from time to time. So you'd better follow my advice and try to make good use of your eyes, take exercise and healthy foods. Hope you find this useful.
Although the plasma tvs hurt a little to eyes from the theory because of its very fast response speed and no delay in dynamic picture, it still has bad points to eyes if you see too much plasma tvs. Your eye nerves will be so stimulated when seeing in front of the plasma tvs for a long time with little rest. Your eyes will easily get tired. If you often see too much plasma tvs, you will be short sighted some day. You'd better have the good rest for the eyes. Then you could use the eye drops to release the tiredness of the eyes. In addition, you could use the warm compress to make your eyes feel comfortable.
If your eyes get effected, there's nothing wrong with the plasma, what matter is the long hours staring at TV screen. There are lots of radiation which can damage people's eyes, and eyesight will drop rapidly.
It may also cause eye strain, dry eyes, red eyes, etc. So, you'd better take a break at least once an hour. Use artificial if needed. Try to avoid getting addicted into tv.
Once you are so into tv series, it's hard to control the time on your own.