... biologic process. PDT can treat a wide range of skin problem sucessfully without the side effect. The operation is ... )Red Light EffectAnti-aging, skin rejuvenation, skin tighting. promote collagen. Whiten, skin lifting., Removal all kinds of pigmentation.such freckle, chloasma, ... of skin,8.Light sources arrayed in matrix to accommodate human facial profiles,9.Low treatment costs (contrasting with ...