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. Author manuscript; available in PMC: 2022 Dec 1.
Published in final edited form as: Adv Drug Deliv Rev. 2021 Nov 3;179:114036. doi: 10.1016/j.addr.2021.114036

Fig. 6.

Fig. 6.

Schematic illustration of the penetration depths of various therapeutic lights (UVC, blue, and NIR) in tissues and the optical waveguide-mediated light delivery for phototherapy. Left: diffused light delivery through a diffuser/diffusing tip at a large lesion; Right: precise light delivery at a specific target site.