Yes, laser shows can be safe, but it depends on how they are managed and whether proper safety measures are followed.
Laser Safety in Shows
Laser shows can be thrilling and visually stunning, but it's crucial to understand the potential risks involved. The safety of a laser show hinges on factors such as the laser power, how the laser beams are used, and the existence of safety protocols.
Audience Scanning and Safety Variances
- What is Audience Scanning? This is a technique where laser beams are directed into the audience.
- FDA Variance: Laser show producers who intend to use audience scanning must obtain a "variance" from the Food and Drug Administration (FDA). This variance permits laser beams to be directed into the audience, provided the laser power is at a level deemed safe.
- Safe Power Levels: According to the provided reference, the safe level for audience scanning is below 2.5 milliwatts per square centimeter (mW/sq. cm.). This means laser power is strictly controlled to ensure it doesn't pose any harm to viewers.
- Importance of Compliance: When a show operates under a variance, it means the laser producer has met strict standards and is being monitored.
Potential Risks of Laser Exposure
Despite these safety measures, certain laser-related risks exist:
- Eye Damage: Direct and uncontrolled exposure to laser beams, especially high-powered lasers, can cause serious eye damage. This is why laser beams must never be directed into an unprotected eye.
- Skin Burns: Although less common, prolonged exposure to high-power laser beams could potentially lead to skin burns.
- Non-Compliance: The main risk to audience safety is from shows that do not follow the appropriate safety measures, such as not obtaining an FDA variance when necessary.
Safety Measures in a Controlled Environment
To ensure the safety of a laser show, event organizers should:
- Obtain proper FDA variance: If audience scanning is part of the show, the producer must have the required FDA variance.
- Proper laser power: Laser power must not exceed 2.5 mW/sq. cm. for audience scanning as regulated in the FDA variance.
- Professional operation: Skilled technicians should operate the laser equipment and adhere to safety protocols.
- Laser beam placement: Lasers need to be controlled and directed to minimize the risk of accidental eye or skin exposure to uncontrolled laser beams, particularly at close range.
- Awareness and Education: Audience should be educated on the safety requirements of the show and should be made aware of the potential hazards.
Conclusion
Laser shows can be enjoyed safely when operators and producers take the necessary precautions and follow strict safety guidelines such as FDA variances for audience scanning. A variance ensures that the laser power is at safe levels to protect the public.
