International modified Delphi consensus statement on visible light photoprotection: Effects, measurement, and recommendations.

Exposure to solar UVR is well-known to elicit photobiologic effects on the skin. However, exposure to visible light (VL) is now known to contribute to numerous cutaneous responses, such as post-inflammatory hyperpigmentation, and play a role in melasma and some photodermatoses. Unlike UVR, no standard methods have been agreed upon for assessing VL photoprotection. The aims of this modified Delphi consensus process were to convene an international panel of experts in VL photobiology to define the cutaneous effects of VL on the basis of current best evidence, determine the populations most in need of VL photoprotection, identify the best strategies for VL photoprotection, and recommend a standardized methodological approach for assessing the effects of VL on the skin. These 27 consensus statements are provided to guide and optimize future research, clinical practice, and product development for VL photoprotection.