High energy laser pointer can cause eye damage

High-energy laser pointers can cause damage even if you look at it for a short period of time. Although the eyes will instinctively close their eyes when exposed to strong light, just a few seconds of irradiation is enough to cause lifelong damage to the delicate macular area. .

   Not long ago, a 10-year-old elementary school student in a certain elementary school bought a high-power laser pointer from a store around the school. Because he used his right eye to get close to the pen, it burned the macular area of ​​his eye and eventually caused irreversible damage to his right eye sight…

   The “worse” caused by the laser pointer is not limited to this case. Previously, many media have reported cases in which primary and middle school students in various regions have suffered a significant loss of vision or permanent damage due to their accidental use of laser pointers.

   Why do laser pointers frequently get into trouble? What makes this “time bomb” a popular toy in the hands of young children? Are schools, teachers, students, and parents sufficiently vigilant and guarded against this “dangerous situation”? The author launched an investigation.

   will cause permanent damage in just a few seconds

 Recently, out of curiosity, a certain elementary school student Huanhuan touched the button of the laser pointer and directed a red light into his left eye. In an instant, his left eye felt the dazzling light, he quickly removed the laser pointer and closed his eyes. When he opened his eyes again, he found a lingering “black spot” in front of him.

   Laser pointer injuries are mostly caused by such “accidents” and “carelessness”: short-range exposure or high-power lasers enter the eyes, causing the user’s eyesight to be greatly reduced or permanent damage.

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The General Administration of Quality Supervision, Inspection and Quarantine issued the laser pointer and children’s laser gun product quality and safety risk warnings and consumer reminders in March 2014 that too high laser radiation power can cause photochemical and thermal damage to the human body, especially for people who are still developing. In children at this stage, if the eyes and skin are exposed to laser radiation, it may cause more serious consequences.

  Laser is directional and concentrated. It focuses to produce heat energy. If the focus falls on the retina, it may burn the eyes. The macular area is the most resolving area on the retina and the most sensitive area of ​​vision. If the laser pointer accidentally burns the visual cells in the macular area, the human’s vision will drop below 0.2. “If the optic nerve cells are burned and necrotic, people Vision will be permanently damaged”.

High-energy laser pointers can cause damage even if you look at it for a short period of time. Although the eyes will instinctively close their eyes when exposed to strong light, just a few seconds of irradiation is enough to cause lifelong damage to the delicate macular area. .

   When the laser causes eye damage, there will be symptoms such as distortion, reduction of vision, and lighter color. If the macular area is burned by the laser, the patient’s visual field will appear a complete blind zone, and there will always be a dark shadow in front of the eyes. “When the laser damages the eyes, usually only one eye has reduced vision, which is difficult for many children to find. If parents find that their children have uncomfortable symptoms such as edema in the macular area of ​​the eyes, they should take their children to see a doctor as soon as possible.

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