The theory behind the use of lasers is that they destroy and disperse pigmentation cells, like using a giant boulder to smash small rocks. Eventually, the dermis pushes the destroyed pigmentation cells to the surface, where they are carried away by megakaryocytes.
雷射去斑的原理是將黑色素細胞打碎、打散，就如同將大石頭打碎成小石頭，然後慢慢由真皮浮到表皮層，再由巨噬細胞運走。