**8.3 Evolution methods of IPL**

The novel IPL/BBL from the high-intensity red (560–580 nm) to infrared (580–1200 nm) wavelengths of light may also improve blepharitis and DE by reducing Demodex and harmful bacteria [53]. This safe and effective protocol treats both the upper eyelid (more meibomian glands) and lower eyelids. It is now an off-label adaptation for ocular rosacea treatment (a form of MGD DED). Significant improvement of periocular symptomatology, MGD blepharitis symptoms, OSDI scores, and recurrence were observed with IPL/BBL after one year (**Figure 4**).
