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If you're using a helmet, might as well use a camera instead...

Would be far cheaper, and could always use eye-tracking to move the camera (or even just zoom and pan to give the effect of looking)

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You wouldn't get any of the effects of blurred vision, crossed eyes, or some such. Also, eyes are far better cameras than anything you'd fit on a helmet.

In some ways. If you recorded just what the rods and cones detected, you'd actually get a really small, really high-resolution area in the center (the fovea) with the rest at extremely much lower resolution. So if you recorded what the quarterback saw, but without the post-processing done by the brain to cache some of the things recently glanced at, it might be pretty hard to watch.

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