To ensure secure operation of co2 surgical laser, the following cautions have to be taken:

• Laser warning signs must be properly placed at the entrance to laser operating rooms. Only those properly trained and educated in laser safety can be granted access to the laser operating rooms.
• Protective eyewear, such as goggle, glasses, and shields must be used to avoid eye injury.
• Don't point laser beam to any flammable material to avoid fire.

For more info, please check out the following link:
Laser Hazards
Select Correct Eyewear
Laser Warning Signs