Photoreception and vision in the ultraviolet

Thomas W. Cronin*, Michael J. Bok

*Corresponding author for this work

Research output: Contribution to journalReview article (Academic Journal)peer-review

87 Citations (Scopus)
413 Downloads (Pure)


Ultraviolet (UV) light occupies the spectral range of wavelengths slightly shorter than those visible to humans. Because of its shorter wavelength, it is more energetic (and potentially more photodamaging) than 'visible light', and it is scattered more efficiently in air and water. Until 1990, only a few animals were recognized as being sensitive to UV light, but we now know that a great diversity, possibly even the majority, of animal species can visually detect and respond to it. Here, we discuss the history of research on biological UV photosensitivity and review current major research trends in this field. Some animals use their UV photoreceptors to control simple, innate behaviors, but most incorporate their UV receptors into their general sense of vision. They not only detect UV light but recognize it as a separate color in light fields, on natural objects or living organisms, or in signals displayed by conspecifics. UV visual pigments are based on opsins, the same family of proteins that are used to detect light in conventional photoreceptors. Despite some interesting exceptions, most animal species have a single photoreceptor class devoted to the UV. The roles of UV in vision are manifold, from guiding navigation and orientation behavior, to detecting food and potential predators, to supporting high-level tasks such as mate assessment and intraspecific communication. Our current understanding of UV vision is restricted almost entirely to two phyla: arthropods and chordates (specifically, vertebrates), so there is much comparative work to be done.

Original languageEnglish
Pages (from-to)2790-2801
Number of pages12
JournalJournal of Experimental Biology
Issue number18
Early online date21 Sept 2016
Publication statusPublished - Sept 2016


  • Chromatic aberration
  • Dorsal rim
  • Opsin
  • Ultraviolet
  • Vision
  • Visual pigments


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