Laser is a kind of monochromatic light with good characteristics of monochromatic and directional, which can bring us spectacular light. Laser pen is not new in our life. They are widely used in education, leisure and other fields. Thanks to the concentration of light beams, they play an important role. But this is a lamp, but it doesn't often appear in the front row because it hurts people. According to the special market survey, the national product injury detection system and special network monitoring, it is found that among the products that pose a major threat to children's safety, the laser pen ranks first. The laser can focus on a very small point on the retina through the fluoroscopy system, resulting in an instantaneous rise in temperature and the destruction of retinal photosensitive cells. If the energy of the laser is enough to cause reflection, it will cause sustained retinal damage and, in severe cases, loss of vision. If the laser intensity is relatively high and a large amount of light energy is concentrated on the retina, the pigment epithelial cells will absorb energy, resulting in the rapid rise of retinal temperature and the condensation, abscission and death of photonic cells. Role. This heat induced protein coagulation eventually causes irreversible damage to visual function. However, at present, there are no mandatory power restrictions and warnings in the laser pen (toy) market.
Children can also freely obtain various powerful Laser pointer or laser toys, which is one of the main reasons for children's visual impairment. The mechanism of laser damage to human eyes is very complex, and there are three main types of damage. The first is the thermal effect. Due to the characteristics of the eye, when the laser passes through the eye, the laser will focus on a very small point on the retina, resulting in an instantaneous rise in temperature and decomposition of retinal light cells. The second is the shock wave effect. The retina is subjected to intense photon radiation, photon impact and rapid thermal expansion of radiation tissue in a short time, resulting in the diffusion of shock wave to the surrounding tissue and damage. The third is photochemical effect. Light irradiates the eyes, causes the vibration of atoms and molecules in the tissue, and affects the electromagnetic and ionization effects of the tissue. Laser damage to the eyes is usually caused by a combination of different effects. If you burn your eyes with a laser pen, the damage will be permanent. If the burn is incurable, we need to go to the hospital as soon as possible and try to treat him before part of the burn heals, otherwise it may affect his vision recovery.