Poor eyesight, dry eyes and envy are common conditions of computer families. This is because many computer users do not pay attention to their own constraints and stare at the screen for a long time. For example, if they watch a computer screen for more than two hours at a time, it will do great harm to their eyes, which will easily slow down their blood circulation and lead to dry eyes.
Office workers who have been engaged in typing or computer drawing for a long time may often feel dull pain in their wrists and fingers from time to time. This shows that the wrist has been injured, and if it is serious, it may suffer from carpal tunnel syndrome. There is a simple way to judge carpal tunnel syndrome: straighten the five fingers of the left hand after typing, and if the fingertips feel shaking, then it can be concluded that there is a precursor to this syndrome. In addition, if the back often feels numb, it is also a precursor to back joint injury.
Although no one knows how much the radiation emitted by computers affects human health, it is an indisputable fact that there is electromagnetic pollution. Various accessories and external devices in the computer case, such as UPS, printers, scanners, etc., are emitting radio waves to the outside world when working. When we are exposed to these electromagnetic pollution, these electromagnetic fields may lead to an increase in the incidence of leukemia. In order to reduce radiation, the office should be kept ventilated and dry, so that those harmful substances can be discharged as soon as possible. At the same time, putting a pot of water or a pot of flowers under the computer desk can also help reduce radiation. In addition, washing your face frequently can also prevent the skin from being stimulated by radiation waves.
Noise is another kind of torture for us, which may cause various neurological complications. Noise of computer mainframe, printer, etc. Unconsciously, it causes bad stimulation to our visual nerve.
At present, the impact of computers and networks on health has aroused great concern.
The first is the direct impact on health. Computer monitors use electron guns to emit electron beams to produce images, accompanied by radiation and electromagnetic waves. Long-term use will harm people's eyes and induce some eye diseases, such as glaucoma. The keys on the keyboard are dense, and the key surface has certain elasticity and resistance. Pressing keys for a long time will be bad for fingers and upper limbs; When operating a computer, the body shape and whole body rarely change, the operation tends to be high-speed, single and repetitive, and the proportion of forced posture is increasing, which easily leads to diseases of musculoskeletal system. Among them, the main parts involved in computer operation are waist, neck, shoulders, elbows and wrists.
The second is the harm of computer microwave to the body. Low-energy X-rays and low-frequency electromagnetic radiation of computers can easily cause disorder of the central nervous system. An office electromagnetic wave study in Britain confirmed that the low-frequency radiation and magnetic field emitted by computer screens can cause 7- 19 diseases, including itchy eyes, neck and back pain, short-term memory loss, irritability and depression. It is also easy to cause abnormal female reproductive function and embryonic development. According to the investigation of more than 200 computer operators in Wuhan banking system, more than 35% of women have dysmenorrhea, prolonged menstrual period and other symptoms, and a few women have premature delivery or abortion. According to the research of the World Health Organization, if pregnant women use computers for more than 20 hours a week, the incidence of abortion will increase by more than 80%, which may also lead to fetal malformation.
The third is to increase mental and psychological pressure. In the process of operating the computer, attention is highly concentrated, eyes and fingers move quickly and frequently, which makes the physical and psychological burden too heavy, causing dreaminess, neurasthenia, headache, decreased immunity and even some mental diseases. This kind of person easily loses self-confidence, and is often nervous, irritable and anxious, which eventually leads to physical and mental exhaustion.
Fourth, it leads to network syndrome. Spending a lot of time and energy chatting and browsing online for a long time will lead to various behavioral abnormalities, psychological disorders, personality disorders and partial dysfunction of sympathetic nerve function. In severe cases, it will develop into network syndrome. The typical manifestations of this disease are: depression, loss of interest, sleep disorder, disorder of biological clock, loss of appetite, weight loss, listlessness, mental retardation and excitement, low self-evaluation, slow thinking and unwillingness to participate in social activities.
Fifth, the gas emitted by computers harms the respiratory system. A research report recently published by researchers of the British Allergy Foundation pointed out that office equipment will release ozone gas harmful to human health, and the culprit is computers, laser printers and so on. These ozone gases are not only toxic, but also may cause some people to have difficulty breathing, especially those with asthma and allergies. In addition, staying in places with high ozone concentration for a long time can also lead to lung diseases.
Nowadays, it is nothing new for computers to enter the home. When people feel that the computer brings convenience to work, life and study, they also begin to suspect that it will bring harm to the human body, especially to pregnant women who have just conceived a baby and husbands who are eager to be fathers. They are engaged in computer work and are in close contact with computers every day. They are most worried about the miscarriage and deformity of the fetus in their stomachs.
Video display terminal (VDT) is the terminal display of electronic computer or television image equipment, and its core component is cathode ray tube. According to the data, its main hazards are ionizing radiation, radio frequency radiation, visible light, infrared ray and air ionization. Hazards to computer operators include visual fatigue, eye discomfort and muscle and joint pain. Due to high work pressure, symptoms of mental weakness may occur, and due to individual differences, some operators may have papules on their skin.
According to foreign data, there are different opinions on the influence of women of childbearing age. In 1984, VDT, spontaneous abortion and birth defects of offspring have been reported in China, Canada, Japan, Finland and Sweden. Some scholars believe that pregnant women exposed to video display terminals for more than 20 hours a week in the first three months found that the abortion rate was significantly higher than the last contact, but the birth defects did not increase. Some scholars believe that this may be related to the TV screen that pregnant women have the strongest contact with.
Women who have been exposed to VDT for a long time, forced to sit for a long time, fatigue and work pressure can all induce and lead to abortion. Although there have been many reports recently denying that VDT causes abortion and deformity, it cannot be completely considered that it has no effect on pregnant women. It is recommended that pregnant women contact no more than 20 hours a week; To prevent poor blood retention caused by sedentary, take a break and reach Zhang Chi; Pay attention to the coordination between the computer and the sitting posture of the seat, so that the baby can develop healthily.
1. Keep away from the electromagnetic field source as far as possible, so that its influence is relatively weakened.
2. Limit the stay time in electromagnetic radiation environment to reduce its harm to human body. It is not advisable to operate the computer continuously for a long time. Children are in the developmental stage, vulnerable and need special attention.
3. Install protective devices to reduce the intensity of electromagnetic radiation.
4. Don't use unqualified or inappropriate products. X-rays on the computer screen are harmful radiation, and qualified products have strict control over X-rays. If the product quality is poor, the X-ray may exceed the standard, and this unqualified product can't be observed and judged by ordinary people, which is easy to cause long-term harm.
5. Eat health foods that resist radiation, protect eyesight, resist fatigue and supplement brain nutrition.
Women who have been engaged in computer-related work for a long time have a higher risk of breast cancer than non-computer workers. This is a survey in Taiwan Province Province. At present, there are more than 3 million computers in Taiwan Province Province, and most of them are women. If you work in front of the computer for a long time, it will increase the risk of breast cancer; Premenopausal women are more likely to develop breast cancer than postmenopausal women.
This study also found that if people are exposed to certain electromagnetic radiation for a long time, they are prone to leukemia, cancer and even abortion. Experts point out that the correct use of computers can reduce the side effects of computers on the human body. The human body should keep a distance of not less than 80 cm from the computer screen and not less than 120 cm from the back and side of the computer.
More and more evidence shows that computers are harmful to human health. Generally manifested in the following aspects.
▲ Microwave hazard: Low-energy X-rays and low-frequency electromagnetic radiation emitted by computers will cause central nervous system disorder. A study in Britain confirmed that low-frequency radiation and magnetic fields emitted by computer screens can cause 7 ~ 19 diseases, including runny nose, itchy eyes, neck and back pain, transient amnesia, irritability and depression. For women, there will be symptoms such as dysmenorrhea and prolonged menstrual period, and a few expectant mothers may also have premature delivery or abortion. In addition, long-term computer work, mental stress, psychological pressure, easy fatigue, coupled with electromagnetic radiation, the incidence of breast cancer among female operators is about 30% higher than that of the average person. Related research also found that computer electromagnetic radiation can also cause cancer; With the popularization of computers and the Internet, a modern new disease called "computer syndrome" will cause people who have been engaged in computer operation and programming for a long time to have symptoms such as headache, insomnia, palpitation, anorexia, nausea, depression, mental retardation, irritability and continuous fatigue due to central nervous system disorder. The best way to protect the computer microwave oven is to keep a distance from it. The safest way to put computers is to put them against the wall at the back, and the distance between each computer is greater than 1 m. If there is really no room, the distance between people and the back of the computer should be kept above 1 meter. If the computer time is too long, set aside 15 ~ 30 minutes every 1 ~ 2 hours, stand up and have a rest, look out the window and breathe fresh air. Drink more tea, tea polyphenols and other active substances in tea are beneficial to absorb and resist radioactive substances.
▲ Vision hazard: When using a computer, the eyes are the most vulnerable, especially causing myopia and ciliary muscle spasm in adolescents. These diseases are called "computer vision syndrome" and are stress-type diseases, because the eyes stare at a place for a long time and blink only one-third of the usual times, thus reducing the secretion of eye lubricant. If this happens for a long time, it will not only cause eye fatigue, ghost and blurred vision, but also cause other uncomfortable reactions. Blink more in front of the screen, increase the secretion of lacrimal glands and moisturize the eyes. The most effective way is to have a proper rest, eat more foods containing vitamin A, and supplement rhodopsin on the retina, such as carrots, cabbage, bean sprouts, tofu, red dates, oranges, milk, eggs, animal livers and lean meat.
▲ Tissue damage: Repeated and tense actions when operating the computer will damage muscles, nerves, joints, tendons and other tissues in some parts. In addition to back pain and carpal tunnel syndrome, in addition to wrist pain or even paralysis, these symptoms will extend to the palms and fingers. More exercise is the most effective way to overcome this computer occupational disease. You don't need too much exercise. Walking, lifting dumbbells and slight aerobic exercise can all achieve good results. Perseverance is very important. Change posture frequently to avoid working in the same posture for a long time. Adjust the tables and chairs to suit your height. The correct height should be: when sitting in a chair, the connection between the elbow and the keyboard should be parallel to the ground, and the computer screen should be placed in a place where your line of sight is slightly lower to ensure that your neck tilts slightly upward when you look at the screen to avoid looking up; Feet should be flat on the ground, the chair should be stable and the backrest should be comfortable.
▲ Respiratory hazards: The gas emitted by the computer will harm the respiratory system. A research report recently published by researchers of the British Allergy Foundation pointed out that office equipment will release ozone gas harmful to human health, and the chief culprit is computers and laser printers. These ozone gases are not only toxic, but also may cause some people to have difficulty breathing. For those who suffer from asthma and allergies, the situation is more serious. In addition, staying in places with high ozone concentration for a long time can also lead to lung diseases. The computer room should always open the doors and windows for ventilation, and place small air fresheners or green plants near the seats to improve the indoor air quality. Printers can also produce irritating gases that irritate the nose and trachea, so long-term contact should be avoided as far as possible.
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