Inventions

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For many years, I've had an eye problem. Am nearsighted and can't see a television without glasses or contacts. I often work on crafts at the same time I am watching a movie and don't need glasses for close up work. Wouldn't it be nice to be able to invent a piece of clear plastic of sorts to slip on top of the screen to watch tv without glasses and continue to work on a close up project? Settings would be on the side to cover a wide variety of selections to vary the range or distance. The only difficulty I can see at this point, would be if 2 people or more were watching the same television program. What's your opinion?