Evolution of the eye
Evolution of the eye
Origins and diversification of the organs of sight through geologic time.
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Readers' pathsAug 2026 – Oct 2026
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Box jellyfish
Class of cnidarians distinguished by their cube-shaped medusae.
6%
Cephalopod eye
Visual sensory organs of cephalopod molluscs.
5.4%
Burgess Shale
Fossil-bearing rock formation in the Canadian Rockies.
5.2%
Planarian
Flatworms of the Turbellaria class.
5%
Nautilus
Family of molluscs.
4.4%
Convergent evolution
Independent evolution of similar features.
3.9%
Ocelloid
Subcellular structure found in warnowiids.
3.1%
Emu Bay Shale
Geological formation in South Australia.
3%
Eyespot apparatus
Photoreceptive organelle.
3%
Euglena
Genus of unicellular flagellate eukaryotes.
3%
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Eye
27%
Convergent evolution
Independent evolution of similar features.
12%
Simple eye in invertebrates
Simple eye without retina.
10%
Cephalopod eye
Visual sensory organs of cephalopod molluscs.
6%
Hagfish
Class of eel-shaped, slime-producing animal.
3.3%
Eyespot apparatus
Photoreceptive organelle.
3.2%
Nautiloid
Extant subclass of cephalopods.
2.2%
Retina
Part of the eye.
2.1%
Evolution of color vision in primates
Loss and regain of color vision during the evolution of primates.
2%
Lens (vertebrate anatomy)
Eye structure.
1.8%