People who engage in computer games stare at the screen for a long time, and their eyes are easily tired. Because the computer screen is not as clear as the black words on the paper, the edge of the image is blurred, it is difficult for the eyes to get the focus, and once the screen moves, it will regain the focus, so the accommodation muscles in the lens of the eyeball will have to be constantly adjusted to see the image clearly, so the computer screen is much more visible, and the visual loss will be great.
In addition, it is also the key that ophthalmologists pay too much attention to not blinking. Computer operation is a job with concentrated vision, which will reduce the secretion of lubricants and enzymes in the eyes. Generally speaking, if people blink less than 5 times per minute and last for a long time, their eyes will be dry and tired, with diplopia, blurred vision, head and neck pain and other symptoms.
The patients who catch up with watching TV dramas are not blinking, but the number is definitely less than that of those who usually use computers. The reason is that watching TV is more leisure and there are advertising spaces, so people's concentration is also low. However, those who use computers to play computer games or surf the Internet may forget to blink. Research abroad has observed computer addicts and found that they don't blink once for more than 2 minutes on average, which hurts their eyes.
Ophthalmologists also pointed out that although teenagers are addicted to playing computer games at present, computer vision syndrome is still very common among office workers, because this disease is caused by accumulated strain. Office workers use their brains for a long time, so their endurance is naturally smaller and they are more likely to get sick. Among them, people engaged in financial work still have to pay attention to foreign stock markets after midnight, and their work and rest often don't match the biological clock, which will have a worse impact on their eyesight health, and they will also suffer greatly.
Consequence: the time to use the "brain" is getting shorter and shorter.
Ophthalmologists believe that when computers are used correctly, watching "screen" will not have any impact on vision health, but the problem is that many people often overuse their eyes, leading to computer vision syndrome.
The symptoms of computer vision syndrome are mainly fever, dryness, astringency and bloodshot eyes when watching the screen, and in severe cases, photophobia, difficulty in opening eyes and eye pain. But at the beginning of the symptoms, most patients were indifferent, but later, because they were "used to" these symptoms, they mistakenly thought that everyone on the computer would have dry eyes and tired eyes, which delayed the treatment and increased the risk of structural problems such as imbalance of tear secretion.
Usually, people who are new to computers will get along with them. They may watch the screen for eight hours every day, but they can still be safe and sound. However, after years of tension, the time for "watching" will be shorter and shorter. Some patients who have been using the computer for several years will start working before turning on the computer at 9: 00 every morning, and their eyes are so dry that 10 cannot be screened. Some patients become seriously photophobic, and even if they have to wear sunglasses indoors, they are more comfortable to see things.