Image:Dragonfly eye 3811.jpg

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Dragonfly with compound eyes. Author: David L. Green

A compound eye is a visual organ found in certain arthropods. The compound eye consists of between 12 and 1,000 ommatidia, little dark/bright sensors. The image perceived by the arthropod is "recalculated" from the numerous ommatidia which point in slightly different directions. In contrast to other eye types, there is no central lens or retina. Though the resulting image is poor in resolution, it can detect quick movements and, in some cases, the polarization of light. Dragonflies have about 30,000 facets to their compound eyes, giving them nearly a 360° field of vision. Photo credit: David L. Green

m:Image:Dragonfly eye 3811.jpg

The following pages on the English Wikipedia link to this file (pages on other projects are not listed):
  • Dragonfly
  • Eye
  • User:Pollinator/Images
  • User:Gaz/Favourites
  • Template:Pic of the day/Archive1
  • Wikipedia:Featured picture candidates/March-2004
  • Wikipedia:Picture of the day/July 2004
  • Wikipedia:Picture of the day/June 2005
  • User:Raul654/favpics/Others' pictures
  • Wikipedia:Picture of the day/June 4, 2005
  • Wikipedia:POTD/June 4, 2005
  • Wikipedia:WikiProject Neuroscience
  • User:Cyde/Featured pictures
  • Wikipedia:Featured picture candidates/archived removal requests 1
  • Wikipedia:Featured picture candidates/Dragonfly Eye Delist
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