There are many elementary and middle school students who like to play with laser pointer. How harmful is the red laser pointer? In many middle and elementary schools, there are many small supermarkets or stationery stores outside the school. Red laser pointers can be purchased at any time. Because the students are relatively young, they are not aware of the harm to the body of this laser pointer. If you accidentally take this laser pointer Expose yourself or other students' eyes, if the time is too long, it is easy to cause damage to the eye tissues. Teachers and parents must remind students of the dangers of red laser pointers to avoid unnecessary dangers.
The power of the red laser pointer held by the students directly determines the degree of injury, and the burn degree of the red laser pointer with different power is different. At present, the power of the red laser pointer is still relatively large. How harmful is the toy laser pointer? Don't look at it as a simple toy, but if the eyeball is irradiated for a long time, it will easily cause vision loss or permanent damage to the eye tissue.
Normally used laser pointers are generally divided into four levels, below level two (0.4 to 1 milliwatt). As long as the exposure time is not long, it will generally not cause harm to the eyes and skin of the human body; but laser pointers above 3-5 milliwatts Larger power can cause human damage.
Some of the green laser pointer currently sold have a power of 100 to 300 milliwatts, which can instantly ignite matches, firecrackers and paper, and even cause fires. In addition, primary and middle school students lack the necessary awareness of self-protection. When playing, a long time exposure can cause damage to the retina and skin surface of the eyes, resulting in permanent damage and even blindness.
Whether you are a parent or a teacher, you must tell the students some knowledge about campus safety, and don't cause irreversible damage to yourself or the eyes of other students because of the momentary playfulness. Students must learn more about campus safety. At the same time, students with laser pointers should not irradiate their eyes directly, as it will damage their eyes.