合规激光风险可控，但需注意个人防护

Core Viewpoint - The use of high-density lasers, specifically Class3R lasers, in concerts has raised public concern regarding safety, particularly in relation to potential eye damage from direct exposure [1][5]. Group 1: Laser Classification and Safety - Class3R lasers are commonly used in concerts and are categorized by the International Electrotechnical Commission (IEC) as having medium to high output power, suitable for creating visually impactful stage effects [2][3]. - The IEC standard 60825-1 classifies lasers into four categories (Class1 to Class4), with Class3R being a subcategory that poses certain safety risks if not managed properly [2][3]. Group 2: Safety Measures and Recommendations - To mitigate risks associated with Class3R lasers, it is crucial to limit the output power and exposure duration, with a recommended maximum exposure time of 0.25 seconds [4]. - Dynamic energy regulation systems are employed during concerts to monitor and adjust laser output in real-time, ensuring safety by preventing excessive exposure to the audience [4]. - Additional safety measures include projecting lasers at angles above 30 degrees and maintaining a minimum distance of 3 meters between the laser beam path and the audience [4]. Group 3: Public Awareness and Precautions - Despite the safety measures in place, there are still risks associated with improper exposure to Class3R lasers, which can lead to eye damage or skin issues if individuals are repeatedly exposed [5]. - Audiences are advised to avoid direct eye contact with laser beams and to take precautions, such as closing their eyes or turning away during laser displays [5][6].