In 2010, it was reported that due to the purchase of high-speed green laser pointer on the Internet, the visual acuity decreased from 6 / 6 to 6 / 12 (20 / 20 / 40); Two months later, the visual acuity recovered to 6 / 6, but there were still some retinal damage. You always see laser guns or baby laser guns at night. Laser has high energy density and can be collected in a short time. That's why lasers are so powerful that they can even be used as weapons. Of course, this means that the laser will cause irreparable damage to us unless used. Lasers can burn tissue, especially the retina. Because the laser beam can be focused into a very small spot on the retina through the eye's own refractive system, the light energy is highly concentrated and cause burns.
Because the laser beam can be focused to a very small point on the retina through its own refraction system, high concentration of light energy can cause burns. When the laser is focused on the light cell, it will overheat, causing the squirrel to harden and denature, causing irreversible damage. If damaged, permanent blindness may result. But remember, never aim a laser at your eyes, whether yours or someone else's. Science and technology is a double-edged sword. To enjoy the benefits of laser, we must ensure safety.If eyes are in direct contact, 1kW laser arrows are dangerous, but scattered reflection paper or other subtype surfaces are harmless. The continuous laser intensity ranges from 315 nm to 0.5 w in the far infrared band. Pulsed laser 400 - 700nm, limit 30MJ. Other limitations apply to other wavelengths and ultrashort pulse lasers. Goggles are usually required for direct observation of class 3B laser beams. 1kW Laser pointer must be equipped with switch button and safety lock.