Hair Removal by Lasers and Intense Pulsed Light Sources

Laser and intense pulsed light (IPL) technologies for hair removal worked on the principle of selective photothermolysis, targeting melanin in hair follicles. Devices like long-pulse ruby, alexandrite, and diode lasers were effective, especially for individuals with dark hair and fair skin. The FDA defined successful hair removal as a 30% reduction in hair growth 3 months post-treatment, indicating temporary rather than permanent results. Side effects included discomfort, erythema, and edema, typically lasting 1-3 days. Proper eye protection was crucial due to the risk of retinal injury. While temporary hair reduction was reliably achieved, permanent hair loss was less consistent.