In July 2013, a report of "Egyptians'fighting' military helicopters with high powered laser" caused a discussion among domestic netizens: Can a small laser pointer really "fight" planes down? Will the pilot’s vision be affected? The laser pointer is an ordinary legal commodity. If it breaks the law, teachers across the country break the law. The people in the business meeting are also breaking the law. Because most of them use laser pointers. The laser is dangerous. During the use and experiment, please follow the specifications and pay attention to the correct and safe use. Not at present. China’s laws and regulations (including the Public Security Management Law and the provisions on transportation) temporarily do not provide for such items. Normal use is not a problem, but it is illegal to illuminate the eyes of others. The blindness rate is more than 90%, and it is suspected. Injury to others, the more powerful will not only hurt the eyes, but also burn the skin.
It is understood that China currently divides the laser’s harm to humans into four levels according to the output power. The output power of the first stage is less than 0.4 milliwatts, the second stage is 0.4 milliwatts to 1 milliwatts, the third stage is 1 milliwatts to 500 milliwatts, and the fourth stage is more than 500 milliwatts. When the output power of the laser is greater than 0.4 milliwatts, it cannot directly illuminate the eyes. When the output power reaches level three, it is easy to cause damage to human eyes, and high power will cause blindness. Scientists have used a 0.5 milliwatt laser to perform experiments on the human eye and compared it with the energy of sunlight. They found that the irradiance of laser light on the retina is 80 times higher than that of sunlight, which can cause burns to the retina. In May 2013, a child in Hangzhou City was diagnosed with retinal damage and interruption of macular area continuity because of the blurred vision caused by the direct laser pointer. It can be seen that the consequences of irradiating the eyes with a laser pointer are very serious.