Dentistry - filling cavities. Oncology - treatment of skin cancer. Lasers are used for cutting and welding procedures - mostly where small parts are involved. Laser beams weld wires onto microcircuits and repair damaged wires inside glass tubes. By aligning heavy machinery equipment, a laser interferometer can control the operations of machinery.
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.