AFAIK, LCD do emit some radiation, just lower than the CRT (cathode ray tube), CRT is something like laser, which shoots ions, thats why the radiation is so high.

But comparing to handphone, you can feel the different immediately, very easy just talk to your friend with handphone for 20minitues, and you will feel your ears are burning, I even do a study on this radiation, by using thermographic, you actually see your brain from green become red, your brain are microwave toost, I tell you...

Its truth that playing computer can make ones become stupid, memory fading away (I am a good example, sometimes it good sometimes it worst), thats the sacrifice you must made... but wherever you work you will use a lot of computer, so face it, you need computer even if you are not a gamer or a programmer.