Well, I guess that Eureka is wrong. Looking at the optic nerves (the tissue that connects the eyes to the back of the brain) and reading up, it seems more logical that because we have a blind spot in each eye and that the crossing of eyes enables better protection from predators and is an environmental advantage. I would guess as our brains have grown in size these optic nerves have become much longer.
As with most things, the evolved solution is really a solution to a multi parameter problem. The optic nerves probably do help out with holding the brain in place (and probably more so in babies when they are developing their skulls in early childhood) but I think that is a lessor % of the total solution.


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