eli5: What are your eyes “focusing” on when you stare into nothingness?

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When you look at a distant object you can feel your eyes adjust as that thing comes into focus. For example, when I look up from my computer and see a tree in the distance. But, what is happening when you stare at the sky or something incredibly far away that you can’t clearly make out? Does your brain know it can’t “focus” on that and relax your eyes? I guess what I’m asking is what triggers that “focusing” reaction and how does your brain tell the difference?

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Anonymous 0 Comments

That seared in visual of buttholes past. Everyone’s got a seared in image of a butthole that they regretted seeing.

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