TV sets are harmful to health. This understanding, now not only has a broad social foundation, but is also increasingly becoming a "marketing tool for manufacturers." For example, the anti-blue liquid crystal does not hurt the eye, the blue light-free eye protection of the OLED TV, the reflective image generation of the laser television, and the like. - It seems that all TV sets can be "healthy eye protection." So what is the truth?
What are the health problems of watching TV?
In traditional TV sets, consumers' “cognition†of health issues is mainly concentrated on the eyes. However, in fact, the health effects of TV sets are comprehensive.
Weibo screenshot of high frequency blue eye
For example, watching TV for a long time can lead to changes in the rhythm of gastrointestinal motility. The basic posture of watching TV is sitting and lying down, and some people like to watch TV. Regardless of the posture, it means "still motion." At the same time, the mind follows the TV program plot and so on, and concentrates heavily on consuming its own nutritional reserves. This creates a contradiction between the "immobilized body" and the "transitional use of the brain." The former is not conducive to gastrointestinal motility, the latter inhibits blood supply and oxygen supply to the gastrointestinal tract. Especially after the meal, I was anxious to watch TV. Watching TV for a long time is very unfavorable for gastrointestinal function. At the same time, due to the reduction of exercise, for the middle-aged and elderly people, this semi-stationary state will also exert resistance to the blood circulation of the lower limbs and cause corresponding diseases.
For another example, when watching a television, people tend to fluctuate with the content of the program. At the same time, the spirit and thought are highly concentrated. This can easily lead to “overwork†in the brain, affecting normal work, life and learning. It is also easy to bring emotional stress and produce some mental or endocrine sub-health problems. At the same time, the more the shocking effect of the big screen, the more the effect is strengthened. This is why some people have dizziness and nausea after watching a two-hour show in the cinema.
Even if the focus of attention is on the eyes, watching the "adverse effects" of TV is not just a matter of stroboscopic, high-frequency blue light. For example, the health problem of watching TV in the first place is "the fatigue of the regulatory group such as the eye ciliary muscle." Because watching TV is equal to "fixed focus" work, the focus of the eyeball is stable at a level for a long time, which is one of the reasons for "myopia". Moreover, at this point, the impact of different display technologies is "not much different."
Therefore, for the matter of watching TV in health, the author believes that “it is not enough to focus on the eyeball aloneâ€, but to understand TV as a “lifestyle and form†and to put it in a healthy and healthy routine. Look at it. For example, some people who work with computers have a habit: tired of work, watching TV relax - in fact, the glasses just left the computer monitor, they are concentrated on the TV screen, and there is no rest and relaxation. This is a typical "lifestyle" issue.
Color TV eye protection technology, in the end "a few points" effect
At present, whether it is LCD TV or OLED TV, the most important eye protection technology is “anti-Blu-ray†– accurately “preventing high-frequency blue lightâ€.
The French National Health and Safety Agency has warned: "Long-term, close-range, repeated exposure to LED light beams containing a large amount of blue light may increase the risk of cataracts and lesions on the retina due to cellular oxidative stress." Taiwanese researchers have done experiments on the "high-frequency blue-ray macular disease strain" in the fundus of mice, which proves the harm of "high-frequency blue light". For TVs, minimizing and filtering blue light at wavelengths below 450 nanometers has become a "healthy" technology.
However, for the understanding of this problem, many people lack comprehensiveness: First, the harm of high-frequency blue light occurs, and it must reach enough “doseâ€, that is, high intensity and long time will directly produce irreversible pathogenic hazards; Second, high-frequency blue light is not a unique product of televisions. For example, sunlight contains a lot of high-frequency blue light. If the danger of high-frequency blue light is "very large," it is not necessary to cover the sun. Therefore, the hazard of high-frequency blue light is suspected of being exaggerated by marketing. Anti-blue light technology is a good technology, but its efficacy should not be exaggerated.
Another technology that is often cited for the health of TV sets is the “bionic reflection†imaging of laser TVs – compared to the direct imaging of most TV screens, laser TV reflection imaging is more consistent with natural images, and the picture is more It is gentle and therefore more healthy and eye-protecting.
However, this view ignores another factor in eye health: the size of the screen. Many consumers have experience. Watching a two-hour movie in a movie theater is more tiring than watching a TV for two hours at home. The reason is that the cinema has a larger picture and the cinema viewing environment is dark – the picture-environment contrast is greater. For laser TVs, the screen size is often 100 inches, which actually increases the "tiredness" of the glasses.
In other words, laser TV has the benefits of reflective imaging for eye protection, and it also has a bigger "tired eye" problem. Of course, the reason many consumers buy laser TV is to go to the big screen, just to experience the shock of the big picture. This is the same as going to the cinema to watch a movie. That is, you can't turn off the cinema because "the big picture makes the eyes more tired" - that is equal to "disintegrated food."
Therefore, as a marketing tool, the concept of health is scientific in itself; but it also has "one-sidedness in the process of realizing commercial interests" and even "exaggeration." In this regard, consumers must have a correct understanding.
What TV is "guaranteeing health"
In any case, consumers always want to buy healthier TV sets. This is also the direction of color TV technology advancement: OLED, anti-Blu-ray LCD, laser TV, all have a certain health aura, but also have a certain health bonus effect. However, "Health TV" ensures a "healthy" choice. why?
First of all, we must clarify this concept: what is the main cause of color TV health problems. When there is no TV, is there no myopia? The answer is no. That is to say, the relationship between the appearance of color TV and eye health is not inevitable. Color TV and modern display technology are not the "root cause" of a series of ophthalmological problems today.
So from a health point of view, what is the real reason for the real health of the left and right eyes, and even the consumer? The answer is "scientific and correct habits." Read books must have correct rest and posture; watch TV must have correct rest and posture; specific work must also have security and correct work... that is, a good habit, including watching TV. Good habits are the real health fundamentals.
Secondly, what are the key factors that cause TVs to cause health problems? Is it high-frequency blue light, strobe, or imaging? The answer is, these are not! The biggest problem is in the way of watching TV: that is, watching more Long time, whether there is a good rest; whether the posture is correct, whether there is oppression of the abdomen, cervical vertebrae, lumbar vertebrae, lower limbs, etc.; viewing distance is not science, especially now that big TV is very popular, is it a small living room big TV configuration, The distance is too close; whether the TV parameter adjustment is scientific, whether it is too bright, whether the viewing environment is too dark or so.
Among them, the most important factor is the length of the viewing period - other factors produce unfavorable results, which need to take the necessary length of time to form. It is generally recommended that you watch TV continuously for no more than 2 hours: if you reach 2 hours, you must take 2 hours of rest (how is the effective rest? It is a real rest, instead of putting down the TV remote control, pick up the phone and computer! ). Even within 2 hours, it is recommended to go to the room for more than 5 minutes every half hour.
That is, from the big life and work habits, to the small habit of watching TV, the impact on health is much greater than the so-called "health technology" of color TV. The regular color TV products on the market are in line with national standards, and all have health and safety under normal and correct use. As long as consumers have good work and living habits and good TV viewing habits, health is not a problem; on the contrary, even the so-called health TV, it is still difficult to ensure long-term incorrect, unhealthy use habits, eye and other health problems. - This is just like a paragraph on the Internet: the kitchen knife is not guilty, although it can kill people.
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