• After I posted that, I got sucked into a Wikipedia sinkhole about scorpions. Similar to what you posted, the two things that stuck out to me were that

    1. Those top eyes are so light sensitive that they can navigate by starlight. But, yeah, their resolution is shit.
    2. Some species have light receptors in the tail segment with the sting.

    Oh, and some species can jettison their tail to save themselves from predators. But since their anus is in their tail, it means they can’t poop anymore, and they obviously can’t sting. However, they can still kill small prey with their pincers and eat, and they can still breed (the important part), and can live for several months after they lose their tail. That doesn’t have anything to do with sight, but it was so morbidly fascinating.