Which parameters are critical when performing laser hair removal?

When performing laser hair removal, the wavelength of the laser is a critical parameter because it determines how effectively the light is absorbed by the target pigment in the hair and the surrounding skin. Different wavelengths penetrate the skin to varying depths and have different absorption characteristics by melanin, the pigment in hair follicles.

For instance, longer wavelengths are better for deeper penetration, making them more effective for treating darker hair on various skin types, while shorter wavelengths may be more absorbed by the epidermis and are useful for lighter hair types. This ability to select an appropriate wavelength significantly influences the success of the treatment and minimizes the risk of damage to surrounding tissues.

In addition to wavelength, parameters like pulse rate, laser power, and spot size are also important, as they can affect the efficacy and safety of the procedure. However, the wavelength plays a foundational role in ensuring that the appropriate energy reaches the hair follicle for effective hair reduction.