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Cited by 50Photonic Crystals and ApplicationsCalcium Carbonate Crystallization and InhibitionOptical Coatings and Gratings

The Dual Functional Reflecting Iris of the Zebrafish

Open access
Gur, Dvir, Nicolas, Jan‐David, Brumfeld, Vlad, Bar‐Elli, Omri, Oron, Dan, Levkowitz, Gil·2018·Advanced Science
DOI 10.1002/advs.201800338PMC PMC6097150

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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.

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Crossref · 10.1002/advs.201800338

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Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • High-angular distribution diffractions having a full-ring signal are indicative of crystal orientations that vary (disordered), whereas low-angular distribution diffractions having a punctuated-ring signal are indicative of crystals that are consistently oriented (ordered).

    “high-angular distribution diffractions having a full-ring signal are indicative of crystal orientations that vary (i.e., disordered), whereas low-angular distribution diffractions having a punctuated-ring signal are indicative of crystals that are consistently oriented (i.e., ordered)10”

    From In situ differentiation of iridophore crystallotypes underlies zebrafish stripe patterning (2020) · cites this paper as [10]

    Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

    Experimental — accuracy not yet measured

  • Crystal plates in iridophores of the stripe zone were well oriented (ordered), whereas those in the interstripe zone were nonaligned (disordered).

    “crystal plates in iridophores of the stripe zone were well oriented (i.e., ordered; Fig. 4a, panels 1 and 3, and Supplementary Fig. 10), whereas those in the interstripe zone were nonaligned (i.e., disordered; Fig. 4a, panels 2 and 4, and Supplementary Fig. 10)”

    From In situ differentiation of iridophore crystallotypes underlies zebrafish stripe patterning (2020) · cites this paper as [10]

    The passage on cryo-SEM imaging (indexed under Abstract; page unavailable) describes ordered crystals in an outer iris iridophore layer and randomly arranged crystals with no preferred orientation in an adjacent iris layer. It does not place those layers in stripe and interstripe zones, so the claimed zone-specific comparison is unsupported. (LLM, conf=0.85)

    Experimental — accuracy not yet measured

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Cites

Flagged first, then by citations

Research works printed but not linked: 20

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Authors
Gur, D., Nicolas, J., Brumfeld, V., Bar‐Elli, O., Oron, D., & Levkowitz, G.
Affiliations
  • Weizmann Institute of Science (IL)
  • University of Göttingen (DE)
  • Department of Physics of Complex Systems Weizmann Institute of Science Rehovot 7610001 Israel
Corresponding author
  • Oron, Dan
  • Levkowitz, Gil
ORCID
Venue
Advanced Science
Publisher
Wiley
Published
2018-06-06
Volume
5
Issue
8
Pages
1800338-1800338
ISSN
2198-3844 (ISSN-L)
DOI
10.1002/advs.201800338
PMC
PMC6097150
OpenAlex
W2807536147
Cited by
50
References
1
Citations by year
2026: 6 · 2025: 4 · 2024: 14 · 2023: 7 · 2022: 7 · 2020: 5 · 2019: 5 · 2018: 2
FWCI
1.38
Type
journal article
Language
en
Open access
Licence
Locations
  • Advanced Science (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • GoeScholar The Publication Server of the Georg-August-Universität Göttingen (Georg-August-Universität Göttingen) (submittedVersion, cc-by)
Funders
Israel Science Foundation (1511/16)
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Photonic Crystals and Applications
  • Physical Sciences › Materials Science › Biomaterials › Calcium Carbonate Crystallization and Inhibition
  • Physical Sciences › Materials Science › Surfaces, Coatings and Films › Optical Coatings and Gratings
Keywords
zebrafish, iris, guanine crystals, multilayer mirrors, light barrier, eye development, optical reflectivity

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