I can’t stop imagining spider’s heads are a Buch of tiny owls holding together now (-_-)

  • Frjttr@lemm.ee
    0·
    3 months ago

    These are all jumping spiders, they have advanced eyes somewhat similar to ours. Other spiders don’t have this “pupil-like” appendage.

  • ✺roguetrick✺@lemmy.world
    0·
    3 months ago

    As the eyes are too close together to allow depth perception, and the animals do not make use of motion parallax, they have instead evolved a method called image defocus. Of the four photoreceptor layers in the retina, the two closest to the surface contain a UV-sensitive opsin (visual pigment), while the two deepest contain a green-sensitive opsin. The incoming green light is only focused on the deepest layer, while the other one receives defocused or fuzzy images. By measuring the amount of defocus from the fuzzy layer, calculating the distance to the objects in front of them is possible.

    • pseudo@jlai.luOP
      0·
      3 months ago

      And we can do all that only with two eyes. The world is a marvel…

    • kamenLady.@lemmy.world
      0·
      3 months ago

      calculating the distance to the objects in front of them is possible.

      So, the look of surprise is real

    • pseudo@jlai.luOP
      0·
      3 months ago

      I just like to mess up with community content with sharing sometimes things that has to me a similaire feeling than what is share to the community, knowing full well it is not the topic (^_^) It stir up conversation and give a bit of fun break to our superb animators/moderators.

      Do worry I don’t spam. That’s just once in a while. It is also a chance for crossover community and community discovery.