Watching TV now has become an indispensable part of many people\'s life. However, even though televisions bring us eyeglasses pleasure, they threaten our health greatly at the same time. Following are four methods to watch TV that damage human eyes badly.

• Watching TV for a long time.

Some people like watching TV, and always keep watching for several hours without appropriate rest. and then they feel dizzy and faint, the symptom is called “televitis” in medical community. Undue watching TV is rather unfavourable to eyes. Someone has done a test, if he continues watching TV for about 4 or 5 hours, his eyesight would drop 30% temporarily, and recover after a period of time. A continuous time watching television and cheap eyeglasses vision's not restored in time will form a long-term vision loss.

• Watching TV without the light.

Some people ordinarily prefer to watch TV or use computer with nearby lights off but luminous light from the screen. The eye experts point that it is wrong to be like that, So eyes are tired easily. Over time, your eyesight will be affected and even your eyes will be badly hurt.

• Moreover, frequent channel shift seems to enjoy a high popularity among the young. They simply find themseleves reading glasses uncertain with the remote controller out of reach.

According to a recent survey of researchers, it shows that frequent change of channels, compared with a long time watching television, damages our eyes more seriously. The screens of most TV sets will become black first, then light when changing channels. At this moment, the lights change suddenly, which will cause damage to eyes. Research man indicates that it is best for you to close eyes before changing channel, or blink after changing, according to researchers.

• The last is watching TVin the car.

Nowadays many tourist vehicles and buses and equipped with TVs in order to help tourists kill time during the journey. According to reason, it is an embodiment of high-quality service. However, watching on vehicles in motion, lots of people will find their eyes dry and sore, or even bad symptoms like dizziness, nausea and vomiting will occur.

For the sake of health of your eyesight, please get rid of the bad habbits above.