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Reblogged from rhamphotheca
JUMPING SPIDER Vision (Phidippus princeps)  ©Diagram: David Hill ©Thomas Shahan/Photos by Shahan Jumping spiders are generally recognized by their eye pattern. All jumping spiders have four pairs of eyes with very large anterior median eyes. Nearly all jumping spiders have their eyes arranged in three rows. Jumping spiders have very good vision centered in their anterior median eyes (AME). Their eyes are able to create a focused image on the retina, which has up to four layers of receptor cells in it. Physiological experiments have shown that they may have up to four different kinds of receptor cells, with different absorption spectra, giving them the possibility of up to tetrachromatic color vision, with sensitivity extending into the ultraviolet range. It seems that all salticids, regardless of whether they have two, three, or four kinds of color receptors, are highly sensitive to UV light. Some species are highly dimorphic in the UV spectrum, suggesting a role in sexual signaling. Color discrimination has been demonstrated in behavioral experiments. The principal eyes have high resolution (11 min. visual angle),   but the field of vision is narrow, from 2 to 5 degrees. The principal eyes have high resolution (11 min. visual angle),  but the field of vision is narrow, from 2 to 5 degrees. Fact Source: http://en.wikipedia.org/wiki/Jumping_spider Other photos you may enjoy: Caracal - see how their pupils differ, the caracal’s stay round Damselfly eye cross-section How Horses See rhamphotheca: Spider close-up: Anterior Median and Anterior Lateral Eyes of a Phidippus princeps Jumping Spider (photo: Thomas Shahan)

JUMPING SPIDER Vision (Phidippus princeps) 

©Diagram: David Hill ©Thomas Shahan/Photos by Shahan

Jumping spiders are generally recognized by their eye pattern. All jumping spiders have four pairs of eyes with very large anterior median eyes. Nearly all jumping spiders have their eyes arranged in three rows.

  • Jumping spiders have very good vision centered in their anterior median eyes (AME). Their eyes are able to create a focused image on the retina, which has up to four layers of receptor cells in it. Physiological experiments have shown that they may have up to four different kinds of receptor cells, with different absorption spectra, giving them the possibility of up to tetrachromatic color vision, with sensitivity extending into the ultraviolet range.
  • It seems that all salticids, regardless of whether they have two, three, or four kinds of color receptors, are highly sensitive to UV light.
  • Some species are highly dimorphic in the UV spectrum, suggesting a role in sexual signaling.
  • Color discrimination has been demonstrated in behavioral experiments.
  • The principal eyes have high resolution (11 min. visual angle),   but the field of vision is narrow, from 2 to 5 degrees.
  • The principal eyes have high resolution (11 min. visual angle),  but the field of vision is narrow, from 2 to 5 degrees.

File:Jumping spider vision David Hill.png

Fact Source: http://en.wikipedia.org/wiki/Jumping_spider

Other photos you may enjoy:

Caracal - see how their pupils differ, the caracal’s stay round

Damselfly eye cross-section

How Horses See

rhamphotheca:

Spider close-up: Anterior Median and Anterior Lateral Eyes of a Phidippus princeps Jumping Spider (photo: Thomas Shahan)

Notes

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    JUMPING SPIDER Vision (Phidippus princeps) ©Diagram: David Hill ©Thomas Shahan/Photos by Shahan Jumping spiders are...
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