Abstract
A laser is an intense and amplified beam of light that is used in many
applications. The use of lasers in medicine, astronomy, industries, defense, information
technology, and oceanography is common and known to many people. The use of
lasers in eye treatment, especially the technique of LASIK in eye surgery, shows the
successful use of lasers in many fields. However, along with so many outstanding
benefits, the intense beam of visible or invisible light also brings many complications
while handling laser beams. Several harms and damages are associated with the use of
laser beams. Skin injuries and eye defects are common complications caused by laser
beams. If proper shielding and safety protocols are not followed, a laser can bring
many harms ranging from minor skin irritations to blindness of the eyes. This chapter
reports the benefits as well as harms and hazards associated with the use of laser
beams. A detailed description of the harms associated with various classes of lasers is
provided here. For the safe use of a laser beam, it is important to follow the established
rules and regulations. A detailed description and discussion of the hazards associated
with the use of laser beams, rules to be followed while using a laser beam, and laser
emergency protocols are reported here.