The harm of laser pen 1. harm
Laser pen is widely welcomed by primary and secondary school students because of its strong laser focusing and heating effect on the irradiated parts, which satisfies the fresh and curious psychology of young people. Normally used laser pens are generally divided into four levels and below two levels (0.4 to 1 MW). As long as the irradiation time is not long, it will generally not cause harm to people's eyes and skin. However, laser pens with power exceeding 3-5 MW are very powerful, which will cause harm to human body. At present, due to the lack of supervision, the power of some laser pens sold around the campus is as high as 100 to 300 MW, which can instantly ignite matches, firecrackers, paper and even cause fires. In addition, primary and secondary school students lack the necessary awareness of self-protection. When playing, long-term exposure will cause damage to the retina and skin surface of the eyes, leading to permanent damage and even blindness.
The harm of laser pen II. Typical cases of neighboring provinces and cities
1. In February this year, a 15-year-old student in Hebi, Henan Province tried to break a balloon with a laser pen and burned a hole in a piece of paper and his sister's sports shoes. As a result, the laser beam accidentally hit his eyes, causing permanent damage to his vision.
2. In March this year, a pupil aged 10 in a primary school in Nanchang, Jiangxi bought a high-power laser pen in a shop around the school, and then put his right eye close to the pen, which burned the macula of his eye. Because I missed the opportunity of treatment, my right eye vision is difficult to recover.
Harm of laser pen three. Sales Status of "Laser Pen" for Students
1, the quality is not up to standard. At present, most of the laser pens sold around the campus come from Guangdong. In order to make huge profits, merchants pretend to be pure imported laser pens. The outer packaging of these laser pens only has English signs, but there are no warning instructions in Chinese, which brings security risks.
2. Pursuing high power. Because primary and secondary school students are brave and competitive, students often compare who has a "laser pen" and who can light matches and paper in a shorter time and take further photos. In order to meet the demand, merchants buy high-power "laser pens" for sale, which poses a great threat to the safety of students.
3. Mobile hawking is very prominent. Due to the lack of daily supervision, in order to attract primary and secondary school students, temporary vendors who set up stalls around the school often use some low-cost, low-quality and high-power laser pens without trademarks to demonstrate the lighting of paper and matches, which is likely to cause fires.
4. Online sales are rampant. At present, there are more than 30,000 "treasures" of "laser pens" on Taobao website alone, and nearly 2,000 laser pens are clearly marked as "high power". Some sellers sell more than 200 pieces a day. Due to the lack of network supervision, many primary and middle school students can easily buy high-power laser pens from the Internet.
The harm of laser pen. Preventive advice
1, the general public and friends should inform the surrounding children in detail about the potential dangers of high-power laser pens and the identification methods of inferior laser pens to prevent children from buying laser pens and causing injuries;
2, the majority of primary and secondary schools should strengthen the relevant safety education, found that students using laser pens should help students identify whether there is a safety hazard, if there is, students should immediately stop using;
3. If the laser pointer is used to cause injury, the personnel present should immediately send the injured person to the hospital for treatment.
The above is the harm of laser pen introduced by Bian Xiao, and I hope it will help you. For more hazards of laser pens, please continue to pay attention to Tuba rabbit decoration.