Since laser pointers are generally visible lasers, most of the damage caused is retinal damage. Severe cases may cause retinal detachment, and light cases may cause vision problems such as dizziness, vertigo, and vertigo. Of course, this is directly related to the power of the laser pointer.
The study found that even low-power laser pointers of no more than 5 milliwatts, even staring at them for a few seconds, can cause permanent retinal damage, but the transient blink response (0.25s) of the normal eye prevents this laser damage, so if you don't deliberately stare without blinking, you can avoid being hurt by a laser pointer below 5mW.
If it is a laser pointer exceeding 5mW, it is necessary to discuss it in detail. The following table is the corresponding table of laser pointer power, laser level and possible damage (this table only applies to laser pointers, not to other laser equipment）:
|Laser pointer power||laser class||harm||Maximum distance to cause damage|
|1-4.9mW||It will not be damaged within 0.25 seconds, but it is easy to cause dazzle, flash blindness and afterimage phenomenon||flash blind||Green light: 34m Red light: 17m|
|dazzling||Green light: 150m Red light: 76m|
|5-50mW||The irradiation time within 0.25s also has 3R damage to the human eye, and the damage increases as the irradiation time becomes longer||flash blind||Green light: 75m Red light: 38m|
|dazzling||Green light: 335m Red light: 170m|
|51-500mW||3B||Not only harmful to human eyes, but also has the possibility of skin burns||flash blind||Green light: 240m|
|dazzling||Green light: 2070m|
|0.5W-2W||4||If it is irradiated, it will not only cause damage to the glasses and skin, but also the diffuse reflection.||flash blind||Green light: 750m|
|dazzling||Green light: 3.2km|
|>2W||4||If it is irradiated, it will not only cause damage to the glasses and skin, but also the diffuse reflection.||flash blind||Green light: 1.5km Blue light: 320m|
|dazzling||Green light: 6.8km Blue light: 1.25km|
|a. After-the-fact image phenomenon: the image seen when the human eye is stimulated will not disappear in a short time
b. The exposure time causing damage shall not exceed 0.25s. If it exceeds 0.25s, it may cause damage even if it is farther than the distance in the table.
Here you can add extra science to the laser level.
Major international authoritative organizations, such as American ANSI (American National Standards Institute), CDRH (Center for Devices and Radiation Health), international organizations OSHA (Occupational Safety and Health Administration), IEC (International Electrotechnical Commission), EN608 and other European standards, Japanese Both JIS C and China's GB standard (National Standard of the People's Republic of China) believe that only Class 1 (excluding Class 1M and Class 1C) is a laser level that does not harm human eyes, and all classes above Class 1 are safe.
There are varying degrees of damage to the human eye; Class 3 and Class 4 lasers are lasers that can burn the skin, let alone hit the eyes directly.
Contact Person: Mrs. Nica Chow