Explanation of isogyre formation by the eye lens.
The eye lens is considered to be birefringent and this property is thought to be responsible for the image of a cross which is formed within the lens when it is placed between crossed polarizers. This paper presents an alternative explanation for the pattern, as a phenomenon of refraction.
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Pierscionek
D001718:Birefringence; D006801:Humans; D007908:Lens, Crystalline / Q000502:physiology*; D008027:Light; D009904:Optical Rotation; D012029:Refraction, Ocular