The mechanisms and clinical outcomes of visible light therapy in vitiligo

Vitiligo is a commonly acquired depigmentation disorder affecting 0.5-2％ of the global population, characterized by well-demarcated white macules due to melanocyte loss or dysfunction ^1）. It is classified into non-segmental vitiligo （NSV）, the more prevalent and progressive form often with bilateral involvement, and segmental vitiligo （SV）, which is unilateral, often dermatomal, and typically stabilizes within 1-2 years.