Encyclopedia of Immunotoxicology

2016 Edition
| Editors: Hans-Werner Vohr


Reference work entry
DOI: https://doi.org/10.1007/978-3-642-54596-2_201162
This term has two meanings:
  • Light sensitivity produced after photons are absorbed by an exogenous chromophore or an abnormally large amount of an endogenous chromophore.

  • Describes the physical process of increasing the (skin) sensitivity to the effects of light, mainly UVA- and UVB-absorbing substances (photosensitizer). When used to describe the reaction of skin to an exogenous chemical and UV or visible radiation, the term includes both photoirritation and photoallergic reactions.


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