• hsdkfr734r@feddit.nl
      link
      fedilink
      English
      arrow-up
      0
      ·
      14 days ago

      jellyfish eyedrops?

      Why would they need eye drops? They are submerged in salty water.

      • unphazed@lemmy.world
        link
        fedilink
        English
        arrow-up
        0
        ·
        13 days ago

        It was an eyedrop that used a protein or something from jellyfish, that affected human eyes to temporarily see better in low light. Been years since I’ve heard anything about it. Another sensationalized “breakthrough” I guess.

        • hsdkfr734r@feddit.nl
          link
          fedilink
          English
          arrow-up
          0
          ·
          edit-2
          13 days ago

          Yes. Light receptors maybe, but eyes…

          source

          … and light-sensing organs called ocelli, which can sense the presence and absence of light. Additionally, some jellyfish have sensory structures called rhopalia, which contain receptors to detect light, chemicals and movement.

          Oh wait! This is unexpected:

          … One group of jellyfish, the cubozoan jellyfish, have complex eyes… with lenses, corneas and retinas in their rhopalia.

          Huh. Wiki agrees:

          box jellyfish are unique in the possession of true eyes, complete with retinas, corneas and lenses.[13] Their eyes are set in clusters at the ends of sensory structures called rhopalia

          Whoa.