A Novel Vertebrate Eye Using Both Refractive and Reflective Optics

@article{Wagner2009ANV,
  title={A Novel Vertebrate Eye Using Both Refractive and Reflective Optics},
  author={Hans-Joachim Wagner and Ronald H. Douglas and Tamara M. Frank and Nicholas W. Roberts and Julian C. Partridge},
  journal={Current Biology},
  year={2009},
  volume={19},
  pages={108-114}
}
Sunlight is attenuated rapidly in the ocean, resulting in little visually useful light reaching deeper than approximately 1000 m in even the clearest water. To maximize sensitivity to the relatively brighter downwelling sunlight, to view the silhouette of animals above them, and to increase the binocular overlap of their eyes, many mesopelagic animals have developed upward-pointing tubular eyes. However, these sacrifice the ability to detect bioluminescent and reflective objects in other… Expand

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References

SHOWING 1-10 OF 30 REFERENCES
Eyes with mirror optics
Most eyes have optical systems that are based on refraction by a lens or a cornea. However, there are two eye types that form images using mirrors. These are concave mirror eyes, similar in principleExpand
Tubular eyes of deep-sea fishes: a comparative study of retinal topography.
TLDR
The distribution of cells within the ganglion cell layer was analysed from retinal wholemounts and sectioned material in ten species representing four genera to investigate the spatial resolving power of these retinae (main, accessory and diverticulum). Expand
Vertebrate receptor optics and orientation
  • J. Enoch
  • Biology, Medicine
  • Documenta Ophthalmologica
  • 2004
TLDR
These findings suggest that a prime role of receptor optics is to favor acceptance of the pertinent visual stimulus passing through the pupillary aperture and to inhibit stray light noise contained in the integrating spherelike eyes. Expand
On the functions of double eyes in midwater animals.
  • M. Land
  • Biology, Medicine
  • Philosophical transactions of the Royal Society of London. Series B, Biological sciences
  • 2000
TLDR
The sizes that apposition compound eyes would need to attain in order to fulfil silhouette detection and luminescence detectors are calculated, and it is concluded that silhouette detection is much the more demanding task, and becomes increasingly difficult as light levels decrease. Expand
Vision in the deep sea
TLDR
It is not only the intensity of light at different depths, but also its distribution in space, which has been a major force in the evolution of deep‐sea vision, is reviewed in support of the following conclusion. Expand
Imaging properties of off-axis parabolic mirrors.
TLDR
A useful formula is derived for the perturbed target irradiance under small tilt errors, based on a new expression for the caustic, which allows one to carry out detailed design studies without recourse to ray tracing codes. Expand
Adaptive Mechanisms in the Ecology of Vision
TLDR
The aim of this work is to provide a Discussion of Vertebrate Optical Structure and Visual Fields in Birds: Their Relationships with Foraging Behaviour and Ecology G.H. Jacobs and to clarify the role of light in the interaction between birds and the environment. Expand
Die Spiegeloptik des Flußkrebsauges
  • K. Vogt
  • Physics
  • Journal of comparative physiology
  • 2004
SummaryIn the superposition eye of the crayfish (Astacus leptodactylus), images are formed by radial plane mirrors arranged in an orthogonal pattern. The optical structure of the crayfish eye can beExpand
The Stiles-Crawford effect--explanation and consequences.
TLDR
The physical properties of an isolated human foveal cone completely determine the Stiles-Crawford effect of the first kind (SC—1) both in the sensitivity to angle of incidence and in the great variation of that sensitivity to wavelength. Expand
Comparative morphology of the tapetum lucidum (among selected species).
TLDR
The tapetum lucidum represents a remarkable example of neural cell and tissue specialization as an adaptation to a dim light environment and, despite these differences, all tapetal variants act to increase retinal sensitivity by reflecting light back through the photoreceptor layer. Expand
...
1
2
3
...