If you ask people today, what is the most indispensable thing in their daily work life? The vast majority of people will not hesitate to say is the computer, the network! The first thing to do at work or home is to open the computer, eight hours a day or even a dozen hours staring at the computer has become a habit for many people. Staring at the computer every day, looking at the flashing video screen, hand and eye crackling on the keyboard, a day down, dizziness, sore eyes, plus shoulder pain, discomfort, day after day, dry eyes, eye itch, eye burning foreign body sensation, blurred vision, vision loss, eye distension, orbital pain and other symptoms are becoming more and more obvious, coupled with a long time stiffly sitting in front of the computer, resulting in cervical spine, shoulder, wrist soreness, swelling. stiffness, and in serious cases, insomnia and even neurasthenia. These frequent symptoms, modern medicine gives a new name, called “video terminal syndrome”, also known as “computer vision syndrome”, the English abbreviation (Visual Display Terminal) for VDT. As a “new” disease, the cause of “video terminal syndrome” is not only the subjective reason of staring at the computer, TV and other video terminals for too long, but also some objective reasons worth noting, including the problems of the computer itself, environmental factors and some vision problems of the computer users. Some vision problems of the user. The problem of the computer itself may be the poor quality of the monitor used, the display image refresh rate is not standard; environmental factors mainly refers to the working environment of insufficient or too strong lighting, or exogenous reflections, glare, etc.; and the use of the computer’s own vision problems is also one of the main causes of “video terminal syndrome”. If the computer users themselves have varying degrees of myopia, hyperopia or astigmatism and other refractive errors, without proper correction, these people are very easy to produce visual fatigue, visual fatigue does not get sufficient rest, recovery, coupled with a long time incorrect sitting posture, in the long run, “accumulation of labor into disease” formed ” Video terminal syndrome”; there are also some people who use computers for a long time, they themselves have invisible strabismus, pre-presbyopia, or significant differences in vision between the two eyes, these reasons also directly lead to “video terminal syndrome”. Most of the patients diagnosed with “video terminal syndrome” suffer from eye discomfort, vision problems, headaches, dizziness and general discomfort, which seriously affect their quality of life and work enthusiasm. This “new” eye disease has become a great concern. After many years of medical practice and contact with many such cases, from the pathogenesis, combined with work and life habits, the following recommendations are made to people who need to use computers for a long time to prevent the occurrence of “video terminal syndrome”: 1. The way to correct myopia, farsightedness, astigmatism, presbyopia and other refractive problems in a timely manner. 2, monitor adjustment: monitor character height should be in the range of 16 ° ~ 25 ° perspective, spacing and line spacing are 25% of the character height and 100% ~ 150%, character and background brightness ratio of 3:1 ~ 15:1, font color selection is based on cool colors, avoid using red and blue and other harsh colors. When looking at the computer display, please note that the position of the line of sight to maintain the display needs to be at least 15 ° below the horizontal line, the distance between the eye and the screen should be more than 50 cm. 3, the adjustment of environmental factors: choose a video with less radiation, such as LCD screen, you can avoid the strong flicker of the screen, dazzling, various rays, radiation and other eye stimulation. Indoor lighting should be moderate, so that the brightness on the screen and the background of the contrast between light and dark is not too large. Position the computer at right angles to the window, do not face the window or back to the window, and avoid direct sunlight on the fluorescent screen. The contrast between the brightness of the VDT screen and the background should not be too large, so that the characters do not jump or flicker. The computer room should be ventilated frequently, install ventilation fans or air conditioning in the room. Computer rooms should be kept clean and sanitary. Install a filter to prevent reflected light. The height of the desk and chair should match the height of the computer. 4, the operation time of VDT should not be too long, it is best to leave the machine every 60min to rest for 10-15min, and look far away from the scenery 5m away, in order to facilitate eye care and vision recovery and relieve visual fatigue. Head, neck, back, arms, wrists, hands and feet should be naturally comfortable, seat, desk height can be adjusted, according to the need to add back cushion, hip pad and foot pad, be sure to sit in a standardized and comfortable to strengthen blink awareness. When using a computer, be conscious of blinking more, generally blinking should be about 25 times per minute, at least not less than 15 to 20 times, otherwise it will make the eyes dry. 5. Dietary guidance: Supplementation of multivitamins and other nutrients: VDT operators have less activity due to long hours of sitting and eye use, plus the possible adverse effects of electromagnetic radiation on the organism, making the organism consume more energy and vitamin A. Patients may experience eye fatigue, poor appetite, constipation and other uncomfortable symptoms. Therefore, the diet of VDT operators should be light and easy to digest. Choose foods rich in vitamin A and protein, such as beans, milk, eggs, carrots, leeks, spinach, tomatoes, fresh fruits, nuts, peanuts and melon seeds. Attention must also be paid to hydration, drinking green tea can effectively prevent electromagnetic radiation-induced VDT syndrome, because it contains tea polyphenols and other natural antioxidants. For people who already have obvious “video terminal syndrome” syndrome, the existing treatment methods mainly include medication and non-pharmacological treatment. Pharmacological treatment, that is, for dry eyes and other local symptoms to artificial tears of eye drops to lubricate the eye surface, to relieve fatigue, such as tears, new tears Ran. In addition, nightly hot compresses combined with lid gland massage is also a very effective method. In addition to medication, there is now an international non-pharmacological treatment called “visual function training”. It is also a popular vision care (VISION CARE) in a combination of “prevention” and “treatment” to solve the “visual fatigue” method, can better relieve The “video terminal syndrome” symptoms are better relieved. This kind of training is actually through different instruments or computer software to carry out targeted functional training, improve visual fusion and adjustment power, effectively alleviate the visual fatigue caused by eye overuse, under-adjustment, pre-presbyopia, hidden strabismus and other reasons. Commonly used training instruments include synoptic machines and red-green vision training. Work can not be done, the computer can not be used, but good vision must also pay attention to maintain! Here to remind everyone, when staring at the computer all day, please pay attention to the combination of work and rest, so that the eyes also get a moment of rest, so that the whole body’s muscles and bones to get a moment of stretching. Feel eye discomfort or vision loss, or find yourself with the above-mentioned “video terminal syndrome” suspicious symptoms, please put down the work in hand, care about their own body, care about their eyes, effective visual health care or functional training will also let your tired eyes enjoy a good, comfortable and refreshing.