Recently, the British Journal of Ophthalmology estimated that about 150 children were injured in the back of the eye by laser. With more than 500,000 low-cost laser pointers of different wattages in circulation, optometrists should be aware of the possible damage, especially damage to children. Initially, the power of the laser-like laser was 1 mW; today, due to advances in manufacturing and labeling errors, the power of the laser is usually as high as 300 mW, low-cost laser pointers can be as high as 1000 mW, and pointers on the market are as high as 6000 mW. All of these more powerful lasers can generate heat, which can burn and cause serious damage to the human body.
Although red 4500 mw laser pointer are still the most commonly used in homes, blue and green laser pointers are becoming more and more popular. These alternative laser colors have higher power levels and you can use them for remote tasks. The green laser pointer is the most efficient in astronomy applications, while the red high powered laser pointer can handle many daily tasks.