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Thresholds and noise limitations of colour vision in dim light

Kelber, Almut LU ; Yovanovich, Carola LU and Olsson, Peter LU (2017) In Royal Society of London. Philosophical Transactions B. Biological Sciences 372(1717).
Abstract

Colour discrimination is based on opponent photoreceptor interactions, and limited by receptor noise. In dim light, photon shot noise impairs colour vision, and in vertebrates, the absolute threshold of colour vision is set by dark noise in cones. Nocturnal insects (e.g. moths and nocturnal bees) and vertebrates lacking rods (geckos) have adaptations to reduce receptor noise and use chromatic vision even in very dim light. In contrast, vertebrates with duplex retinae use colour-blind rod vision when noisy cone signals become unreliable, and their transition from cone- to rod-based vision is marked by the Purkinje shift. Rod–cone interactions have not been shown to improve colour vision in dim light, but may contribute to colour vision... (More)

Colour discrimination is based on opponent photoreceptor interactions, and limited by receptor noise. In dim light, photon shot noise impairs colour vision, and in vertebrates, the absolute threshold of colour vision is set by dark noise in cones. Nocturnal insects (e.g. moths and nocturnal bees) and vertebrates lacking rods (geckos) have adaptations to reduce receptor noise and use chromatic vision even in very dim light. In contrast, vertebrates with duplex retinae use colour-blind rod vision when noisy cone signals become unreliable, and their transition from cone- to rod-based vision is marked by the Purkinje shift. Rod–cone interactions have not been shown to improve colour vision in dim light, but may contribute to colour vision in mesopic light intensities. Frogs and toads that have two types of rods use opponent signals from these rods to control phototaxis even at their visual threshold. However, for tasks such as prey or mate choice, their colour discrimination abilities fail at brighter light intensities, similar to other vertebrates, probably limited by the dark noise in cones.

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organization
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Contribution to journal
publication status
published
subject
keywords
Colour vision, Purkinje shift, Visual ecology, Visual threshold
in
Royal Society of London. Philosophical Transactions B. Biological Sciences
volume
372
issue
1717
publisher
Royal Society
external identifiers
  • scopus:85012271424
  • wos:000394258900004
ISSN
0962-8436
DOI
10.1098/rstb.2016.0065
language
English
LU publication?
yes
id
8b60707d-55a1-408a-bcc7-747ba58f4d6b
date added to LUP
2017-02-22 11:40:11
date last changed
2018-04-29 04:36:28
@article{8b60707d-55a1-408a-bcc7-747ba58f4d6b,
  abstract     = {<p>Colour discrimination is based on opponent photoreceptor interactions, and limited by receptor noise. In dim light, photon shot noise impairs colour vision, and in vertebrates, the absolute threshold of colour vision is set by dark noise in cones. Nocturnal insects (e.g. moths and nocturnal bees) and vertebrates lacking rods (geckos) have adaptations to reduce receptor noise and use chromatic vision even in very dim light. In contrast, vertebrates with duplex retinae use colour-blind rod vision when noisy cone signals become unreliable, and their transition from cone- to rod-based vision is marked by the Purkinje shift. Rod–cone interactions have not been shown to improve colour vision in dim light, but may contribute to colour vision in mesopic light intensities. Frogs and toads that have two types of rods use opponent signals from these rods to control phototaxis even at their visual threshold. However, for tasks such as prey or mate choice, their colour discrimination abilities fail at brighter light intensities, similar to other vertebrates, probably limited by the dark noise in cones.</p>},
  articleno    = {20160065},
  author       = {Kelber, Almut and Yovanovich, Carola and Olsson, Peter},
  issn         = {0962-8436},
  keyword      = {Colour vision,Purkinje shift,Visual ecology,Visual threshold},
  language     = {eng},
  month        = {04},
  number       = {1717},
  publisher    = {Royal Society},
  series       = {Royal Society of London. Philosophical Transactions B. Biological Sciences},
  title        = {Thresholds and noise limitations of colour vision in dim light},
  url          = {http://dx.doi.org/10.1098/rstb.2016.0065},
  volume       = {372},
  year         = {2017},
}