A CRT TV or monitor won't damage your eyes unless your really close. The Electrons will loose energy at a certain distance away from the screen.
Most of the electrons will be absorbed by the florescent plate anyway.
The old wives tale says that if you sit too close to the TV you will get square eyes. Some element of truth, as you should sit too close as instead of square eyes you will undoubtedly get eye cancer.
Quote: "According to an article I read on MSN news, it strains your eyes which can make them hurt temporarily, but causes no permanent damage, that's just an old wives tale."
However Short-Sightedness (Myopia), is not caused by radiation from the Beta source.
By viewing objects close to you for a prolonged period, you are working the Ciliary muscles in your eye. And everybody knows what happens when you give your muscles a work out. They become stronger and more tight. This changes the shape of the lens permanently and actually sets you in short sighted mode because your lens is now focused to view close objects as the muscles are so tight. I think this is correct anyway. It may also be true that the lens can flatten if stretched too much.
This is true for any near work. Eg reading
Quote: "Oh man go say that out loud in a pub."
Ha! Excellent!
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