During the epidemic, primary and secondary school students across the country suspended classes and continued to study online. Faced with electronic devices such as mobile phones and computers all day, children’s eye health has become a major concern for parents. Many parents want to wear a pair of anti-blue glasses for their children. So, what is blue light? Is blue cnc lighting harmful to health? Is it necessary to buy anti-blue glasses? Don’t worry, experts from the National Electric Light Source Quality Supervision and Inspection Center of Shanghai Quality Inspection Institute will answer you one by one.

What is Blu-ray?

First of all, it needs to be clear that not only electronic products can emit blue light. Blue light is an indispensable spectral component in nature. For example, there is a lot of blue light in sunlight. Moreover, blue light is one of the three primary colors. If the blue light is forcibly removed, the color of the object cannot be truly reflected.

Is blue light harmful to health?

It is irrational to talk about harm regardless of dose. The International Commission on Illumination (CIE) issued a statement stating that the blue-ray retinal hazard is mainly related to staring at the sun with the naked eye or high-intensity cnc lighting emission such as electric welding. The American Academy of Ophthalmology (AAO) also issued a statement stating that long-term exposure to blue light from electronic products will not affect the eyes. In addition, blue light is a double-edged sword for humans. Although high blue light components may harm the retina, proper blue light has the benefits of regulating human circadian rhythms, inhibiting the development of myopia, and treating pathological jaundice symptoms. Whether blue light is harmful to health depends on whether humans can use blue light correctly. The blue light produced by the screen is not harmful at all.

Is it necessary to buy anti-blue glasses?

At present, anti-blue lenses are divided into two categories: reflective and absorptive. Reflective anti-blue light means that when the lens is coated, a layer of blue-reflecting film is coated; absorptive anti-blue light means adding a material that can absorb blue light when the substrate is made. Both of these methods play a so-called anti-blue light effect by reducing blue light components, which will inevitably affect the light transmittance, color reproduction, comfort and other properties of the glasses. That’s why the color of the anti-blue light lenses we usually see is yellowish. Therefore, for ordinary consumers, unless there are specific occasions and functional requirements, there is no need to buy anti-blue glasses.

How to protect eyes correctly?

• 1. Choose high-quality electronic products
  When using electronic products such as display screens, it must first meet the corresponding quality standards, and the display must have appropriate resolution and clarity.
• 2. Cooperate with suitable ambient light
  The brightness ratio between the display screen and the surrounding light environment should be adjusted to an appropriate range. If the display screen should not be used facing or facing the window, when facing the window, the high brightness outside the window and the high contrast between the display screen will reduce the eye comfort; and the back facing the window will easily cause the outdoor light to shine on the screen to form a light curtain Reflection affects the visual effect. Therefore, the best condition is to place the display window vertically. At night, you should turn on the ambient light source or use a desk lamp to reduce contrast. In addition, the ambient lighting should avoid flickering and stroboscopic phenomena, and choose a light source with high color rendering.
• 3. Good eye hygiene
  The most effective way to relieve visual fatigue is to pay attention to reducing the time of eye use and pay attention to healthy eye use methods. For this, refer to the method given by the American Academy of Ophthalmology (AAO):
  ✔ Sit about an arm away from the computer screen and keep the screen at a height where you can look down slightly.
  ✔ Matte film can be used to reduce screen glare.
  ✔ Use the “20-20-20” rule to take regular breaks: every 20 minutes, look at objects 20 feet (6 meters) away for at least 20 seconds.
  ✔ When your eyes feel dry, use eye drops to relieve visual fatigue.
  ✔ Adjust the indoor cnc lighting and try to increase the contrast of the screen.
  ✔ Replace contact lenses with frame glasses.
  ✔ Increase the number of blinks appropriately.