Lasers are able to cut teeth in saws. In the Hubble Telescope to overcome the effects of atmospheric turbulence. To detect flaws in fabrics. Lasers using gases can, if not handled correctly, develop leaks, allowing poisonous vapors to escape into the environment. Also, very powerful, high concentration lasers can burn or cut the skin.
Lasers can also prove to create more problems in surgical procedures than they correct.
In medical applications, when lasers are used to treat skin cancers, the laser beam impact may push some live cancer cells deeper into the patients body, allowing the cancer cells to multiply, and spread further. Scientific goggles are worn to protect the eyes from harmful light emissions. The environment may be affected by the gases that are used to produce the laser because they involve dangerous components, and must be monitored continually for vapor leaks. One precaution we take in our environment to protect ourselves from the dangers of visible light is to safeguard our eyes from direct sunlight, or any form of bright light. Through the use of sunglasses and various other light reducing devices, we may greatly reduce damages to the sensitive parts of the inner eye, especially the retina.