TVs are harmful to health. This understanding now has not only a broad social foundation, but has also increasingly become a "manufacturer's marketing" tool. For example, Blu-ray-free liquid crystals do not hurt the eyes, blue light-free eyes of OLED TVs, reflection-like imitation of eye-protection of laser televisions, and the like. - It seems that all televisions can be "healthy and eye-protecting." So what exactly is the truth?
What are the health problems watching TV?
In the use of traditional televisions, consumers’ "cognition" of health problems is mainly focused on the eyes. However, in reality, the health effects of televisions are all-encompassing.
Microblogging screenshots on high-frequency blue eyes
For example, long-term watching TV can lead to changes in gastrointestinal motility rhythm. The basic posture for watching TV is sitting and lying, and some people like to watch TV. Regardless of the posture, it means "still motionless." At the same time, the mind follows the TV program plots and other operations, and they also concentrate their energy and consume their own nutritional reserves. This creates a contradiction between the "immobile body" and the "transitional brain." The former is not conducive to gastrointestinal motility, which inhibits gastrointestinal blood supply and oxygen supply. Especially after the meal, it is anxious to watch TV. Watching TV for a long time is not good for gastrointestinal function. At the same time, due to reduced exercise, for the middle-aged and the elderly, this semi-static state will also cause resistance to the blood circulation of the lower extremities and cause corresponding diseases.
For another example, when a television is viewed, people tend to fluctuate with the content of the program. At the same time, the spirit and thoughts are highly concentrated. This can easily lead to "overwork" of the brain and affect normal work, life, and learning. It is also easy to bring emotional pressure, resulting in some mental or endocrine sub-health problems. At the same time, the greater the shock effect of the big screen, the more it will strengthen this effect. This is why some people feel dizzy and nauseous after watching the two-hour program at the cinema.
Even if the focus of attention is on the eyes, watching TV's "unfavorable effects" is not only a matter of strobing and high-frequency blue light. For example, the top TV health issue is "fatigue of the eye ciliary muscle and other regulatory groups." Because watching TV is equal to the "fixed focus" work, the front and rear focus of the eyeball has long stabilized at a level, which is one of the reasons for "myopia". Moreover, at this point, the impact of different display technologies "is not much different."
Therefore, for health TV watching, the author believes that “not just focusing on one organ of the eyeball is enough,†but instead we should regard watching TV as a “lifestyle and form†and put the whole body on a healthy and healthy schedule. Look at it. For example, some people who work with computers have a habit: When they are tired, look at TV and relax—in fact, the glasses just left the computer monitor and they focused on the TV screen, and they did not get rest and relaxation at all. This is a typical "lifestyle" problem.
TV eye protection technology, in the end "a bit" effect
At present, whether it is LCD TVs or OLED TVs, the most emphasized eye protection technology is "anti-Blu-ray" - precisely, "prevents high-frequency blue light."
The French National Health and Safety Administration 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." Researchers in Taiwan have done experiments on the “high-frequency blue light yellow spot strain†at the fundus of the mouse and indeed proved the harm of “high-frequency blue lightâ€. For televisions, minimizing and filtering blue light at wavelengths below 450 nm has become a "healthy" technology.
However, for the understanding of this problem, many people lack comprehensiveness. First, the hazards of high-frequency blue light occur, and must reach a sufficient "dose", that is, high intensity and long time will directly produce irreversible pathogenic hazards; Second, high-frequency blue light is not a unique product of a TV set. For example, sunlight contains a lot of high-frequency blue light. If the harm of high-frequency blue light is “very large,†then it is not necessary to cover the sun. Therefore, the danger of high-frequency blue light has been suspected of being exaggerated by marketing. Anti-Blu-ray technology is a good technology, but its effectiveness should not be exaggerated.
Another frequently cited technique for the health of televisions is the “bio-reflective imaging†of laser televisions—in contrast to the direct screen imaging of most televisions, laser television reflection imaging is more consistent with the images of nature, and the picture is more It is gentle, so it is more healthy and eye-protecting.
However, this view ignores another factor in the use of eye health: the size of the screen. Many consumers have experience. Looking at a movie in a movie theater for 2 hours is more tired than watching TV for two hours at home. The reason is that the picture of the movie theater is larger and the viewing environment of the movie theater is dark - the picture-environment contrast is even greater. For laser televisions, the screen size is often 100 inches, which actually increases the "exhaustiveness" of glasses use.
In other words, laser televisions have the benefit of eye-reflective imaging, and they also have larger "eye" problems. Of course, the reason why many consumers purchase laser televisions is to go to the big screen, just to experience the shock of the big screen. This is the same reason as watching a movie in a movie theater. That is, the movie theaters cannot be closed because "the big picture makes the eyes more tired.
Therefore, the concept of health as a means of marketing itself is scientific, but it also has "one-sidedness in the realization of commercial interests" and even "exaggeration." In this regard, consumers must have the correct perception.
What TV "Ensure Health"
In any case, consumers always want to buy healthier TV sets. This is also the direction of color TV technology advancement: OLEDs, Blu-ray-free LCDs, and laser TVs all have a certain degree of health and a certain health bonus. However, "Health TV" ensures "healthy" choices. why?
First of all, we must clarify this concept: what is the main cause of color TV health problems? Is there no nearsightedness when there is no television? The answer is no. In other words, the relationship between the appearance of color TV and eye health is not inevitable, color TV and modern display technology are not the “root causes†of a series of ophthalmic problems today.
From a health point of view, then, what is the real reason for the left and right eyes as well as the entire health of consumers? The answer is "a scientifically correct habit." Reading books must have correct routines and postures; watching TV must also have correct routines and postures; specific work must also have security protection and correct rest ... that is, a good living habits, including watching television." "Good habits" are fundamental to true health.
Secondly, what are the key factors causing TV health problems, such as high-frequency blue light, stroboscopic flash, or imaging methods? The answer is, these are not! The biggest problem lies in the “watching of TVâ€: that is, seeing more Whether there is a good rest for a long time, whether the viewing posture is correct, whether there is oppression of the abdomen, cervical vertebrae, lumbar vertebrae, lower extremities, etc.; the viewing distance is not science, especially now that the big TV is very popular, is it the configuration of a small living room TV? The distance is too close; the adjustment of the television parameters is not scientific, whether there is excessive light, whether the viewing environment is too dark, and so on.
Among them, the most central factor is the "long time for watching" - other factors have unfavorable results and all need to be formed for the necessary duration. It is generally recommended that you watch TV continuously for no more than 2 hours: If you reach 2 hours, you must effectively rest for 2 hours (What is an effective break? It is a real break instead of putting down your TV remote control and picking up your phone and computer! ). Even within 2 hours, it is recommended that you see more than 5 minutes for each half hour, and you must have more physical activity.
From the big living and work habits to the small TV watching habits, the impact on health is much greater than the "health technology" of TVs. Those regular color TV products in the market are all in line with national standards. They are all guaranteed to have health and safety under normal and correct use. As long as consumers have good work and living habits and good TV watching habits, health is not a problem; on the contrary, even if it is a so-called health TV, it is still difficult to maintain long-term inaccurate and unhealthy usage habits, eyes and other health problems. - This principle is like a paragraph on the Internet: The kitchen knife is not guilty, although it can kill.
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