There are many medical applications of lasers, and there are different ways to classify them into groups:

• According to the organ to be treated by the laser, such as: Eye, General Surgery, Dentistry, Dermatology, Blood vessels, Cardiac, etc.
• According to the type of laser used for treatment, such as: CO₂, YAG, and Argon.
• According to the type of treatment, such as diagnostic, surgery, connecting blood vessels.


The classification used here is basically according to the type of treatment, with comments on suitable lasers used for each application:

• 9.2.1 Lasers in medical surgery.
• 9.2.2 Lasers in diagnostic medicine, and in combination with drugs.
• 9.2.3 Lasers for specific applications:  Soft lasers.
When using lasers for medical treatments, a good understanding of the interaction between specific laser radiation with specific biological tissue is required.