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Visualization of chromatic correction of fish lenses by multiple focal lengths

Publiceringsår: 2005
Språk: Engelska
Sidor: 691-700
Publikation/Tidskrift/Serie: Journal of Optics. A, Pure and Applied Optics
Volym: 7
Nummer: 11
Dokumenttyp: Artikel i tidskrift
Förlag: IOP Publishing


Many fish and some terrestrial animals have multifocal lenses that compensate for chromatic aberration by a mechanism unique to biological optical systems. We describe four optical methods for the study of such lenses. Significantly improved methods (focal-area imaging, schlieren photography, and laser scanning) are explained in full detail. One method (photorefractometry) was only slightly modified over earlier versions and is illustrated in brief. Portable equipment is available for photorefractometry, schlieren photography, and laser scanning. With our methods we could for the first time directly illustrate chromatic correction by multifocal lenses and detect a number of previously unknown optical features of fish lenses.


  • Zoology
  • crystalline lens
  • physiological optics
  • fish
  • schlieren photography
  • photorefractometry
  • laser scanning


  • Lund Vision Group
  • ISSN: 1741-3567

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