Is the laser TV that mainly plays the health card and costs 20,000 or 30,000 yuan really eye protection? Parents are half in faith

This article is transferred from: Beijing News Network

"Laser TV has no radiation, and long-term viewing will not cause eye fatigue" "Visual comfort is more than 20% higher than paper reading!" Under the epidemic, online classes have become the daily routine of many children, and TV manufacturers have also targeted this "business opportunity", persuading parents to take laser TV as the first choice, and blowing various eye protection functions into the sky.

Is the laser TV that mainly plays the health card and costs 20,000 or 30,000 yuan really eye protection? In the reporter's visit, the sales staff not only insisted on the statement of "who protects the eyes, who hurts the eyes", but also contradicted the test reports displayed.

Courtesy of Visual China

■ Anxiety

You have to buy it for the sake of your children, no matter how expensive it is

"Expensive is expensive, but for the sake of children, this money must also be spent!" Mr. Nie, who lives in ChunfengheYuan in Fengtai District, gritted his teeth and finally bought a 90-inch 4K laser TV in Changhong. At the sound of "ticking", the POS machine at the cash register spit out a small ticket, showing that the consumption amount was 20,000 yuan.

This price is much higher than the price of LCD TVs. Taking the best-selling 70-inch TV on the market as an example, a Changhong 70-inch 4K ultra-high-definition LCD TV only costs 3299 yuan. Eye protection has become the most important reason for Mr. Nie to buy laser TV, "Children have to take online classes to protect their eyesight." ”

Affected by the epidemic, children's time for online classes has increased. "6 lessons a day, about 40 minutes a lesson. That's the equivalent of staring at an electronic screen for at least 4 hours a day. "The mother of the student's small and good children said that worrying about the increase in the burden of children's eyes has become the hottest topic in the parent group recently." Only the 5th grade of primary school, 20 people in the class of 35 classmates have myopia, and then stare at the screen so often, myopia may have to deepen! ”

■ Contradictions

Test reports vary

"Buy a TV for your kids, laser TV is definitely the first choice!" At the Suning Tesco Huiju store, the sales staff of Hisense Laser TV simply said: "The visual comfort of this TV is 20% higher than reading books!" ”

While knocking on an 88-inch laser TV screen, the salesman told reporters that the TV screen is a "board", which does not emit light itself, and there is no stimulation of direct light sources for the child's eyes, just like the child looking at the blackboard in the classroom.

In addition to not shining, "it's okay to look close" has also become the main selling point of laser TV sales. "Such a big TV, so close to see, can the child's eyes bear it?" Inside the store, Ms. Lu, a citizen, could not help but question. The salesperson responded emphatically: "It's all right! Watch laser TV can be closer. ”

The floor of the store also shows a comparison of the viewing distance of LCD TV and laser TV: 75-inch laser TV, only 2 meters apart, while the same distance can only watch 43-inch LCD TV.

In order to prove what they said "reliable", the sales staff also showed the reporter a "laser TV visual health test certificate", the content of a review done by the ophthalmology expert team of Peking Union Medical College Hospital and the Saixi Laboratory of the China Electronics Technology Standardization Institute, the result is: watching the LCD TV for a long time will produce a certain degree of eye swelling, eye pain, dry eyes, and watching laser TV, the subject has no obvious vision changes and eye discomfort, which is more conducive to protecting the health of the eyes.

"The LCD TV background looks particularly bright, and the eyes can't stand it for a while, and many children have become short-sighted because of this." But the laser TV will not be eye fatigue no matter how to watch, and there is no radiation. The sales staff of Changhong Laser TV gave an analogy to the reporter, "LCD TV is like sunlight, laser TV is like moonlight." ”

What is surprising is that the reporter just stepped out of the Hisense store on the front foot, and the sales staff of the Sony store next door took the initiative to stop the reporter and said: "Buy an eye-protecting TV for your child?" Laser TV is the most eye-hurting! Don't be fooled. The sales staff of Skyworth stores also directly "dismantled the station", saying that laser TVs hurt their eyes the most seriously. "You can measure it yourself, turn on the phone photo mode to see how strong the laser video flash is, which is more likely to cause visual fatigue to children."

In order to prove that what he said was not false, the salesman also showed a test report from Beijing Children's Hospital to reporters, showing that "the impact of 4K large-screen LCD TV on human eye visual fatigue is smaller than that of laser TV, and the eyes are healthier." ”

■ Investigation

The principle explains the opposite

How exactly does a laser TV protect or hurt the eyes? During the visit, the reporter found that for the core principle behind it, not only the sales of the same category of TV have "infighting" in the statement, but the explanation of TV sales in different categories is even more contradictory, which is confusing.

"Laser TV eye protection is because of the principle of diffuse reflection, through diffuse reflection to the screen and then present the picture to the eyes, less dazzling." Hisense's sales staff praised the diffuse reflection. When the reporter proposed that the brightness and color saturation of the laser TV were significantly lower than that of the LCD TV, the sales excitedly argued that it was precisely because the brightness of the laser TV was not so high, so it protected the eyes. "Lcd and OLED TVs are very bright colors, but this is not a natural color, it hurts the eyes too much."

Changhong's sales staff will be laser TV can protect the eyes first attributed to the size, large size of the TV screen, to a certain extent, will increase the movement of the eyeballs, to avoid long-term concentration and dry eyes, fatigue. At the same time, according to its words, manufacturers have a newly upgraded visual algorithm, and harmful short-wave blue light below 450 nanometers can be effectively isolated by 99.99%, "You know, blue light is the most harmful to the eyes." ”

However, the most eye-hurting blue light in his mouth, in the mouth of another salesman, has become "unsubstantiated", "At present, there is no direct evidence that blue light causes myopia, and some advertisements claim that no harmful blue light can protect the eyes, and there is no scientific basis at all." ”

The sales staff of Sony TV pointed the finger at "diffuse reflection", accusing consumers of using misunderstandings. "Everyone thinks that this product is reflected light, and the screen is not so bright to protect the eyes." However, for home use, during the day, affected by ambient light, the color rendering, brightness, clarity, contrast and other aspects of the laser TV cannot go up, but it will make the eyes stare hard and aggravate the eye fatigue. ”

Contradictory statements make ordinary consumers fall into the clouds.

■ Recommended

Scientific eye follows "320"

"Scientific eye protection is not something that can be solved simply by buying an eye protection TV." Zhu Jianbo of the Optometry Center of Ophthalmology of Beijing Tongren Hospital said that at present, the number of children and adolescents suffering from myopia is increasing, and the age of myopia onset is getting smaller and smaller, and the younger the age, the progress of myopia is usually faster and more serious.

Zhu Jianbo explained that the main cause of myopia is that there are too many eyes at close range, and there are fewer outdoor activities, and the child's eyes cannot have a full distance adjustment. There are also some genetic and nutritional factors. "The key to scientific use of the eye is to have the correct reading and writing posture, such as a punch from the side of the table, an inch from the eye from the book, and an inch from the tip of the pen."

"Scientific eyes should also follow the '320' principle, when using the eyes for 20 minutes at close range, rest for 20 seconds, look at a distance of 20 feet (6 meters), and reasonably control the 'video time'." Zhu Jianbo said that the consensus of ophthalmologists is to advocate that children's outdoor activities are not less than two hours a day, and no less than ten hours a week, and the effect of outdoor activities with sunshine will be better.