How to prevent blue laser from damaging the eyes?
How does the blue laser pointer hurt the eyes? What kind of light is light? Why can a small laser pointer blind children's eyes? Laser is a kind of light, which belongs to electromagnetic wave. But different from ordinary light, it is a kind of "orderly advance and retreat, unified action, organized and disciplined" light, so it has the characteristics of high brightness, high directionality, high monochromaticity and high coherence. The output brightness of an ordinary laser is more than 1 billion times greater than the brightness of the sun's surface. In order to understand the biological hazards of laser radiation, research on the threshold of eye and skin damage has been carried out. Generally speaking, human eyes are more fragile than human skin. Unlike skin, the cornea (the transparent outer front surface of the eyeball) is not protected by an outer layer of dead cells. In the far ultraviolet or far infrared region of the spectrum, the lens of the eye is easily damaged. However, the most concerned is the area of retinal spectrum damage, about 400nm (violet light) to 1400nm (near infrared), and includes the entire visible part of the spectrum.
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The hazards of laser products are classified into Class 1, Class 1M, Class 2, Class 2M, Class 3R, Class 3B, and Class 4 from low to high. Only Class 1 laser products are considered safe under reasonably foreseeable use conditions. Allowed as a children's toy. Consumers are advised to choose qualified products from regular manufacturers according to the use of laser pointers. It is worth noting that improper use of regular products can also cause harm, so be sure to use the product in strict accordance with the instructions for use, and do not let children come into contact with laser products above Class 1. Ordinary consumers are not sure about the product category, for safety reasons, do not let children come into contact with laser products.How to avoid the laser pointer damaging the eyes first, please do not buy laser products above Class 1 as children's toys. Second, parents must regulate the use of laser pointers and other laser tools, and it is strictly forbidden to shoot directly into the eyes, skin, clothing and other places; at the same time, be sure to place the laser pointer out of the reach of children. Third, in some workplaces where laser products are frequently used, professional laser protective glasses should be worn correctly. In addition, bad light and eye habits will gradually "poison" the eyesight of teenagers and children. Dr. Yuan Yijun said that to maintain good eyesight, it is very important to develop healthy eye habits. Eyes are very fragile, so be careful when using light. Do not look directly at the laser with your eyes at any time, otherwise you may really be "blind". Of course, avoid using your eyes under too strong or too weak ordinary light, avoid looking directly at strong light, use your eyes moderately, pay attention to rest, reduce the use of electronic products, and develop healthy eye habits. These are important for saving myopia. It is also very necessary for young people who are still tall.
2021-09-18 06:26:35
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