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Ostrich ocular optics.

G R Martin1, U Ashash, G Katzir

  • 1School of Biosciences, The University of Birmingham, Birmingham, UK. G.R.Martin@bham.ac.uk

Brain, Behavior and Evolution
|January 24, 2002
PubMed
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The ostrich eye is large and globose, with its lens and cornea equally contributing to its optical power. This avian eye structure is a scaled-up version of starling and owl eyes.

Area of Science:

  • Ophthalmology
  • Comparative Anatomy
  • Avian Biology

Background:

  • The ostrich eye's optical properties are not well-documented.
  • Understanding avian visual systems provides insights into evolutionary adaptations.

Purpose of the Study:

  • To determine the optical structure of the ostrich eye (Struthio camelus) using a schematic eye model.
  • To compare the ostrich eye's optical design with other avian species.

Main Methods:

  • Construction of a schematic eye model for paraxial optics.
  • Analysis of axial length and anterior focal length.
  • Interspecific optical comparison.

Main Results:

  • The ostrich eye is large (axial length = 38 mm) and globose.

Related Experiment Videos

  • Anterior focal length is 21.8 mm.
  • Cornea and lens contribute equally to the total optical power.
  • Ostrich eye is optically a larger scaled version of starling and owl eyes.

    • Conclusions:

    • The ostrich eye exhibits a unique optical configuration.
    • The findings contribute to the comparative understanding of avian visual systems.