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Scorpion eyes are NOT where I thought

Time to move away from the Spoods and mantids, and give Diablo a little love. Since my last post about Diablo, I have added approximately 8 extra litres of coco fibre substrate into his enclosure. He loves to dig, he really loves to fill his food bowl with dirt, and who am I to stop him from doing what makes him happy? He's settled down enough now that he's not tapping on the glass all night, too. He's often found out in the daytime, just sitting and chilling. Which is nice. It also means that I've been able to get a pretty good look at him, even if I've not been able to get a decent photograph of him.
When I took this photo of him, it was very obvious to see that he had two eyes, on the top of his head, in a central position. But I had heard that arachnids have between six to eight eyes. On my tarantulas, you can clearly see eyes - if not individual ones then you can see distinct clusters of eyes. So where are the others?
Well, having done a bit of digging around the internet, it seems that while scorpions do indeed have a main pair of eyes on the top of their head (carapace), they also have two extra clusters of eyes. These are usually found along the front edge of the carapace, on the left and right sides (though actual placement and arrangement of clusters does differ between species).
It is hard to see these clusters on Diablo, as he is a black scorpion with black eyes, so I looked for some photos of sand-coloured scorpions, where their lighter colour makes it easier to identify the eyes. It's a bit like if we had extra eyes on our cheeks:
I did wonder how Diablo was able to see his prey if it was underneath him, although I suspect vibration may aid in hunting in that situation. Still, it's pretty cool in a creepy sort of way.
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