In recent years, cases of injuries to children's eyes, skin and other body tissues due to improper use of laser pointers have occurred in many parts of the country. Wu Yifan was suspected of being illuminated by a laser pointer while performing "Big Bowl of Wide Noodles"! Fans not only shouted "Kick the perpetrator out!" on the spot, they also caused a lot of anger on the Internet. Fans of Cai Xukun who performed at the same show also said that his idol was also a victim. Not only was he exposed to laser light last night, but he had also experienced similar incidents earlier. Relevant experts pointed out that according to the classification of national standards, the degree of harm of laser products from low to high is classified as Class 1, Class 1M, Class 2, Class 2M, Class 3R, Class 3B, and Class 4. Only Class 1 laser products are reasonably foreseeable. Under the conditions of use, it is considered safe and allowed as a toy. The laser pointers are mostly 3R and 3B laser products, and their power far exceeds the Class 1 laser products that can be used as toys in the national mandatory standards. In response to the Laser pointer exposure incident at the closing ceremony of the 2014 Nanjing Youth Olympic Games, the South Korean Embassy in China issued a statement on its official Weibo yesterday, stating that the embassy is still in the process of confirming the correct factual relationship. It is extremely inappropriate and regrettable to irradiate leaders of other countries with a laser pointer, and such incidents should not happen.
When the infrared rays emitted by the laser pointer illuminate the eyes, the retina will immediately absorb the energy of the light, causing damage to the epithelial layer. If the laser is directed at the center of the retina, which is also the most sensitive and vulnerable macular area, the macular area will be burned or burned through. Unlike the cornea and lens, the macular area can be transplanted or replaced. This damage cannot be recovered by any surgery or treatment. Therefore, the practice of irradiating members with a laser pointer is very inappropriate, and it may cause undesirable or serious consequences.When using high-power laser equipment, be sure to wear protective glasses! We use precision equipment manufacturing technology to create high-quality laser pointers (pen type). I just let them use the projector in a meeting or presentation to explain it to everyone in an easy-to-understand way. The conveying distance can reach hundreds of meters. Since most colors can be distinguished, I tend not to think that there are more color codes where they cannot be distinguished. Therefore, you may not notice the color coding. Color-blind people cannot handle well the "color names" (color categories) created to match the color vision of non-color-blind people. Therefore, it becomes difficult to communicate using color names. When there are multiple color names for similar color stimuli→simulate the 3rd and 4th stages of the 1st and 2nd color blindness. Most colors are brown for people who are color-blind, but there are categories such as green, red, orange, and brown in the color name, which can be confusing.