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Visible light in photodermatology.

Shanthi Narla1, Indermeet Kohli2, Iltefat H Hamzavi2

  • 1Department of Dermatology, Henry Ford Health System, Detroit, MI, 48202, USA. shanthi.narla1@gmail.com.

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PubMed
Summary
This summary is machine-generated.

Visible light (VL) significantly affects skin, causing pigmentation in darker skin and erythema in lighter skin, especially when combined with UVA1. Current UV filters are insufficient, necessitating new photoprotection strategies against VL.

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Area of Science:

  • Photobiology
  • Dermatology
  • Skin of Color Research

Background:

  • Visible light (VL) was previously considered to have minimal photobiologic effects on skin.
  • Emerging research indicates measurable effects of VL across all skin types.
  • VL's role in skin pigmentation and erythema is increasingly recognized.

Purpose of the Study:

  • To review the cutaneous effects of visible light.
  • To highlight VL's potential role in various dermatologic conditions.
  • To emphasize the need for enhanced photoprotection against VL.

Main Methods:

  • Literature review of studies on visible light and skin.
  • Analysis of VL effects on pigmentation and erythema in different skin types.
  • Evaluation of current UV filter efficacy against VL.

Main Results:

  • Visible light induces more intense, longer-lasting pigmentation in dark skin than UVA1.
  • VL combined with UVA1 potentiates pigmentation and causes erythema in light skin.
  • Existing UV filters do not adequately protect against VL effects.

Conclusions:

  • Visible light and UVA1 play a role in sun-aggravated conditions like hyperpigmentation, melasma, and phototoxicity.
  • VL is a critical factor in photodermatology.
  • Further research and development of VL photoprotection are essential.