Light absorption is known to be one of possible mechanisms of light action on biological tissues. In any case, it always accompanies phototherapeutic irradiation of a living organism in practice. The objective of this paper ...

Light action spectra for main skin chromophores are simulated. Porphyrins are selected as target chromophores. They can produce singlet oxygen (SO) reactions under tissue irradiation, which acts as a natural photosensitizer. ...