The biggest safety issue with lasers is the potential harm to human eyes and skin.
Lasers emit a concentrated beam of light that can cause damage to the eye's retina and skin if proper safety precautions are not taken. This is why it's important to use laser protective eyewear and follow manufacturer guidelines when operating lasers.
Additionally, lasers can cause fires or explosions if used improperly, making it essential to handle them with care.
As long as safety measures are taken, however, lasers can be a safe and incredibly useful tool for a variety of applications in industries like medicine, manufacturing, and research.