The sunlight spectrum consists of UV, visible and infrared light. Visible sunlight can be detected by the human eye, while the others remain invisible. Part of this visible spectrum has a high energy level and is known as high-energy visible light. It is also referred to as HEVIS light, HEV Light, HEVL and sometimes ‘blue light’ or ‘blue violet light’
Like UVA rays, HEVIS light penetrates the deeper layers of skin (the dermis) and can generate free radicals. These free radicals are one of the main causes of photoaging (premature skin aging caused by the sun). They interfere with skin cells and break down the collagen and elastin that gives our skin its plump, youthful appearance. HEVIS light has also been linked to uneven skin pigmentation and melasma.
Many modern sunscreens offer effective protection against UVA and UVB rays, but we recommend that you look out for products that also defend against the negative effects of HEVIS light. These products will give your skin reliable protection from photoagingand, in the long run, can also help to combat visible signs of skin aging such as wrinkles.