Preliminary Evaluation of Improvements in Melasma and Photoaging With Laser-Driven Microjet Injection of Poly-d,l-Lactic Acid

Melasma, a common skin hyperpigmentation disorder, has traditionally been linked to hormonal changes in genetically predisposed individuals. Recent studies, however, highlight the role of photoageing, particularly from visible light exposure, as a significant contributing factor. Effective treatments for melasma and associated signs of photoageing remain a clinical challenge.