Lasers may be different from one another in several specific ways. Source of energy applied. The energy applied to the lasing material may come from a powerful light source, electric current, or a chemical reaction. Continuous or pulsed emission of the laser beam. The energy applied to the lasing material may be continuous or applied on pulses.
Some lasers can produce hundreds of thousands of pulses per second.
The hazards related to the use of lasers vary depending on the type of laser, the power of the laser, the purpose and manner in which the laser is used, and the safety features of the laser. Health Hazards Eye injuries are the most serious danger from laser beams. The cornea of the eye is like a glass window that allows light to enter the eye. It is located in the very front part of the eyeball. The cornea is very sensitive and injuries to the cornea can be very painful.