The Dual Functional Reflecting Iris of the Zebrafish

Dvir Gur, Jan David Nicolas, Vlad Brumfeld, Omri Bar-Elli, Dan Oron, Gil Levkowitz

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Many marine organisms have evolved a reflective iris to prevent unfocused light from reaching the retina. The fish iris has a dual function, both to camouflage the eye and serving as a light barrier. Yet, the physical mechanism that enables this dual functionality and the benefits of using a reflective iris have remained unclear. Using synchrotron microfocused diffraction, cryo-scanning electron microscopy imaging, and optical analyses on zebrafish at different stages of development, it is shown that the complex optical response of the iris is facilitated by the development of high-order organization of multilayered guanine-based crystal reflectors and pigments. It is further demonstrated how the efficient light reflector is established during development to allow the optical functionality of the eye, already at early developmental stages.

Original languageEnglish
Article number1800338
JournalAdvanced Science
Volume5
Issue number8
DOIs
Publication statusPublished - Aug 1 2018

Fingerprint

Iris
Zebrafish
Light
Camouflage
reflectors
Guanine
camouflage
Synchrotrons
Cryoelectron Microscopy
Pigments
Aquatic Organisms
Fish
retina
guanines
Optical Imaging
fishes
Diffraction
pigments
organisms
Imaging techniques

Keywords

  • biomineralization
  • guanine crystals
  • iridophores
  • photonic crystals
  • vision
  • zebrafish development

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Biochemistry, Genetics and Molecular Biology (miscellaneous)
  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Gur, D., Nicolas, J. D., Brumfeld, V., Bar-Elli, O., Oron, D., & Levkowitz, G. (2018). The Dual Functional Reflecting Iris of the Zebrafish. Advanced Science, 5(8), [1800338]. https://doi.org/10.1002/advs.201800338

The Dual Functional Reflecting Iris of the Zebrafish. / Gur, Dvir; Nicolas, Jan David; Brumfeld, Vlad; Bar-Elli, Omri; Oron, Dan; Levkowitz, Gil.

In: Advanced Science, Vol. 5, No. 8, 1800338, 01.08.2018.

Research output: Contribution to journalArticle

Gur, D, Nicolas, JD, Brumfeld, V, Bar-Elli, O, Oron, D & Levkowitz, G 2018, 'The Dual Functional Reflecting Iris of the Zebrafish', Advanced Science, vol. 5, no. 8, 1800338. https://doi.org/10.1002/advs.201800338
Gur D, Nicolas JD, Brumfeld V, Bar-Elli O, Oron D, Levkowitz G. The Dual Functional Reflecting Iris of the Zebrafish. Advanced Science. 2018 Aug 1;5(8). 1800338. https://doi.org/10.1002/advs.201800338
Gur, Dvir ; Nicolas, Jan David ; Brumfeld, Vlad ; Bar-Elli, Omri ; Oron, Dan ; Levkowitz, Gil. / The Dual Functional Reflecting Iris of the Zebrafish. In: Advanced Science. 2018 ; Vol. 5, No. 8.
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