Precautions before buying the laser pointer

The laser pointer is now a common tool for presentations. Anyone can buy it cheaply, for example B. Transaction on the Internet. However, laser pointers are often used as toys by children. Laser pointers are not without danger: if the output power of the laser beam is too high, there is a risk of harm to the eyes. You don't even have to look directly at the laser beam. There are also reflected radiation, such as B. walls and display surfaces, which can cause permanent damage to the eyes. Injured retina can cause blindness. If the output power of the laser pointer increases, it will not only damage the eyes, but also damage the skin and cause burns.