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Optics of cone photoreceptors in the chicken (Gallus gallus domesticus).

Wilby, David; Toomey, Matthew B; Olsson, Peter LU ; Frederiksen, Rikard; Cornwall, M Carter; Oulton, Ruth; Kelber, Almut LU ; Corbo, Joseph C and Roberts, Nicholas W (2015) In Journal of the Royal Society Interface 12(111).
Abstract
Vision is the primary sensory modality of birds, and its importance is evident in the sophistication of their visual systems. Coloured oil droplets in the cone photoreceptors represent an adaptation in the avian retina, acting as long-pass colour filters. However, we currently lack understanding of how the optical properties and morphology of component structures (e.g. oil droplet, mitochondrial ellipsoid and outer segment) of the cone photoreceptor influence the transmission of light into the outer segment and the ultimate effect they have on receptor sensitivity. In this study, we use data from microspectrophotometry, digital holographic microscopy and electron microscopy to inform electromagnetic models of avian cone photoreceptors to... (More)
Vision is the primary sensory modality of birds, and its importance is evident in the sophistication of their visual systems. Coloured oil droplets in the cone photoreceptors represent an adaptation in the avian retina, acting as long-pass colour filters. However, we currently lack understanding of how the optical properties and morphology of component structures (e.g. oil droplet, mitochondrial ellipsoid and outer segment) of the cone photoreceptor influence the transmission of light into the outer segment and the ultimate effect they have on receptor sensitivity. In this study, we use data from microspectrophotometry, digital holographic microscopy and electron microscopy to inform electromagnetic models of avian cone photoreceptors to quantitatively investigate the integrated optical function of the cell. We find that pigmented oil droplets primarily function as spectral filters, not light collection devices, although the mitochondrial ellipsoid improves optical coupling between the inner segment and oil droplet. In contrast, unpigmented droplets found in violet-sensitive cones double sensitivity at its peak relative to other cone types. Oil droplets and ellipsoids both narrow the angular sensitivity of single cone photoreceptors, but not as strongly as those in human cones. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the Royal Society Interface
volume
12
issue
111
publisher
Royal Society
external identifiers
  • pmid:26423439
  • wos:000363487600016
  • scopus:84945953389
ISSN
1742-5662
DOI
10.1098/rsif.2015.0591
language
English
LU publication?
yes
id
6c9ab004-0032-4faf-a3db-5c437c5acc3d (old id 8159910)
date added to LUP
2015-11-11 14:14:49
date last changed
2017-07-02 03:07:16
@article{6c9ab004-0032-4faf-a3db-5c437c5acc3d,
  abstract     = {Vision is the primary sensory modality of birds, and its importance is evident in the sophistication of their visual systems. Coloured oil droplets in the cone photoreceptors represent an adaptation in the avian retina, acting as long-pass colour filters. However, we currently lack understanding of how the optical properties and morphology of component structures (e.g. oil droplet, mitochondrial ellipsoid and outer segment) of the cone photoreceptor influence the transmission of light into the outer segment and the ultimate effect they have on receptor sensitivity. In this study, we use data from microspectrophotometry, digital holographic microscopy and electron microscopy to inform electromagnetic models of avian cone photoreceptors to quantitatively investigate the integrated optical function of the cell. We find that pigmented oil droplets primarily function as spectral filters, not light collection devices, although the mitochondrial ellipsoid improves optical coupling between the inner segment and oil droplet. In contrast, unpigmented droplets found in violet-sensitive cones double sensitivity at its peak relative to other cone types. Oil droplets and ellipsoids both narrow the angular sensitivity of single cone photoreceptors, but not as strongly as those in human cones.},
  articleno    = {20150591},
  author       = {Wilby, David and Toomey, Matthew B and Olsson, Peter and Frederiksen, Rikard and Cornwall, M Carter and Oulton, Ruth and Kelber, Almut and Corbo, Joseph C and Roberts, Nicholas W},
  issn         = {1742-5662},
  language     = {eng},
  number       = {111},
  publisher    = {Royal Society},
  series       = {Journal of the Royal Society Interface},
  title        = {Optics of cone photoreceptors in the chicken (Gallus gallus domesticus).},
  url          = {http://dx.doi.org/10.1098/rsif.2015.0591},
  volume       = {12},
  year         = {2015},
}