... , melasma.4) Dilated Vessels, such as varicose veins (vascular), telangiectasis, port wine stains, hemangiomas, rosacea Wavelength640nm-950nm & 530nm-950nm Filter handle for ... , melasma.4) Dilated Vessels, such as varicose veins (vascular), telangiectasis, port wine stains, hemangiomas, rosacea.It makes use of the resistance difference ...