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  Poor eyesight linked to genetics
Updated 30 July 2004, 10.11
Scientists think blindness is genetic
Blaming playing computer games and TV for causing problems with people's eyesight may not be completely right.

Scientists have been arguing for a while to try to decide if what happens to your eyesight is decided before you are born or not.

Earlier this month, a group of experts decided that it was what happened after people are born that is most important.

But now another group think it's more likely that what happens to your eyes is decided before you are born.

Watching TV from close to the screen is still bad
Watching TV from close to the screen is still bad
However, they also advise parents not to let their children spend too much time playing computer games and reading.

The latest group of scientists studied hundreds of pairs of twins to see if they had the same problems with their eyes.

They decided that a tiny part of your body responsible for helping your eyes develop may also be responsible for your eyesight getting worse.

But they also agreed that if you spend lots of time looking at things close to you, your eyes will start to struggle to see things further away.

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