Overuse of computers is prone to dry eye
Mr. Wang works in the closed office building every night, working towards the computer late at night, and enjoys air-conditioning and heating services all year round.
Recently, he often feels like tears, dry eyes, fever, seeing things clearly, and sometimes itching too much, so he goes to the city eye hospital for treatment.
Examination revealed that her tears and problems with the meibomian glands (glands that secrete “eye feces”) were diagnosed as dry eye.
According to Li Lihua, director of the Optometry and Optician Center of the City Ophthalmology Hospital, dry eye is a senile disease, but replacements are transmitted through computers and changes in the working environment. The number of dry eye patients among young people and even middle school students increases, especially in the officeThe population has become a potential high incidence of dry eye.
Li Lihua reminded that dry indoor and outdoor air in winter is a season of high incidence of dry eye.
People do not work continuously for more than two hours in front of the computer. When working, they often practice blinking or eyeballs trying to look upwards to the left and right, similar to “rolling their eyes”, which helps prevent dry eye.
Li Lihua said that normal people’s eyes will continuously secrete tears, and then by blinking, the tears will be evenly applied to the cornea and conjunctiva surface to form a tear film to keep the eyeballs moist and not dry, which is the basis for maintaining eye health.
Long-term use of a computer or driving will reduce the frequency of blinking, reduce the stability of the tear film, and increase the risk of dry eye.
Normal people blink about 20 times per minute. If you want to extend your eyes and stare at a fast-moving screen, reduce the number of blinks to 4 to 5 times per minute. The tear film is difficult to stabilize, which makes your eyes dry and astringent.
In addition, more and more office workers work in a closed air-conditioned environment for a long time, the air is dry and not circulating, and the moisture of the eyeballs evaporates too quickly, which will also reduce tear secretion and easily cause dry eye.
The general symptoms of dry eye are dry eyes, burning sensation, and broken eyes; acid eyes, itchy eyes, fear of light and vision loss. When the air conditioner is open, the air is not flowing, smoke, and irritating gas are obviously intensified.
Because the patient’s widespread secretion of tears is reduced, which makes the eyes susceptible to irritation and cause a tearing response, unexplained tearing may be the initial manifestation of dry eye.
Li Lihua said that the most effective way to prevent dry eye is to maintain a regular lifestyle, get enough sleep and drink plenty of water.
However, in the case that the nature of the work cannot be changed, the best method is to perform blinking at high frequency and intactly. Don’t “keep your eyes closed”, rest your eyes at least once every hour, and do eye exercises to help relieve eye fatigue.
If you are an eyewear family, it is best not to use contact lenses in front of a computer, and to wear frame glasses.
The working posture and distance are also very important. The recommended distance is 50 to 70 cm. The phosphor screen should be slightly lower than the eye level by 10 to 20 cm to form a lower viewing angle of 15 to 20 degrees. This exposes the surface of the eyeball to the air.The area is minimized.
However, after working for about an hour in the lower viewing angle, you should also try to perform eye movements to the left and right.
The ambient light should be soft, and the brightness of the computer screen can be adjusted to half of the maximum brightness. It is better to see clearly but darker than the surrounding objects.
Many experts also believe that the occurrence of dry eye is related to chronic lack of vitamin A. Therefore, people who have been forced to operate the computer for a long time should pay attention to diet conditioning. They should eat more soy products, fish, milk, walnuts, greens, Chinese cabbage, water spinach, tomatoes andFresh fruits and more.