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The Eye of the Common Octopus (Octopus vulgaris)

Hanke, Frederike D. LU and Kelber, Almut LU (2020) In Frontiers in Physiology 10.
Abstract

Octopus vulgaris, well-known from temperate waters of the Mediterranean Sea and a well-cited model species among the cephalopods, has large eyes with which it scans its environment actively and which allow the organism to discriminate objects easily. On cursory examination, the single-chambered eyes of octopus with their spherical lenses resemble vertebrate eyes. However there are also apparent differences. For example, the retina of the octopus is everted instead of inverted, and it is equipped with primary rhabdomeric photoreceptors rather than secondary ciliary variety found in the retina of the vertebrate eye. The eyes of octopus are well adapted to the habitat and lifestyle of the species; the pupil closes quickly as a response to... (More)

Octopus vulgaris, well-known from temperate waters of the Mediterranean Sea and a well-cited model species among the cephalopods, has large eyes with which it scans its environment actively and which allow the organism to discriminate objects easily. On cursory examination, the single-chambered eyes of octopus with their spherical lenses resemble vertebrate eyes. However there are also apparent differences. For example, the retina of the octopus is everted instead of inverted, and it is equipped with primary rhabdomeric photoreceptors rather than secondary ciliary variety found in the retina of the vertebrate eye. The eyes of octopus are well adapted to the habitat and lifestyle of the species; the pupil closes quickly as a response to sudden light stimuli mimicking a situation in which the octopus leaves its den in shallow water during daytime. Although the many general anatomical and physiological features of octopus vision have been described elsewhere, our review reveals that a lot of information is still missing. Investigations that remain to be undertaken include a detailed examination of the dioptric apparatus or the visual functions such as brightness discrimination as well as a conclusive test for a faculty analogous to, or in lieu of, color vision. For a better understanding of the octopus eye and the functions mediated by it, we suggest that future studies focus on knowledge gaps that we outline in the present review.

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type
Contribution to journal
publication status
published
subject
keywords
cephalopods, octopoda, optics, vision, visual function
in
Frontiers in Physiology
volume
10
article number
1637
publisher
Frontiers Media S. A.
external identifiers
  • scopus:85078805524
  • pmid:32009987
ISSN
1664-042X
DOI
10.3389/fphys.2019.01637
language
English
LU publication?
yes
id
83001d1a-d047-40a7-8596-6ba2642bcf04
date added to LUP
2020-02-13 12:44:11
date last changed
2020-11-16 02:59:24
@article{83001d1a-d047-40a7-8596-6ba2642bcf04,
  abstract     = {<p>Octopus vulgaris, well-known from temperate waters of the Mediterranean Sea and a well-cited model species among the cephalopods, has large eyes with which it scans its environment actively and which allow the organism to discriminate objects easily. On cursory examination, the single-chambered eyes of octopus with their spherical lenses resemble vertebrate eyes. However there are also apparent differences. For example, the retina of the octopus is everted instead of inverted, and it is equipped with primary rhabdomeric photoreceptors rather than secondary ciliary variety found in the retina of the vertebrate eye. The eyes of octopus are well adapted to the habitat and lifestyle of the species; the pupil closes quickly as a response to sudden light stimuli mimicking a situation in which the octopus leaves its den in shallow water during daytime. Although the many general anatomical and physiological features of octopus vision have been described elsewhere, our review reveals that a lot of information is still missing. Investigations that remain to be undertaken include a detailed examination of the dioptric apparatus or the visual functions such as brightness discrimination as well as a conclusive test for a faculty analogous to, or in lieu of, color vision. For a better understanding of the octopus eye and the functions mediated by it, we suggest that future studies focus on knowledge gaps that we outline in the present review.</p>},
  author       = {Hanke, Frederike D. and Kelber, Almut},
  issn         = {1664-042X},
  language     = {eng},
  month        = {01},
  publisher    = {Frontiers Media S. A.},
  series       = {Frontiers in Physiology},
  title        = {The Eye of the Common Octopus (Octopus vulgaris)},
  url          = {http://dx.doi.org/10.3389/fphys.2019.01637},
  doi          = {10.3389/fphys.2019.01637},
  volume       = {10},
  year         = {2020},
}