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I think a useful way to think about it is that your perceptual brain isn't in the business of making you see, or hear, or anything like that - it's in the business of giving you an accurate-enough-to-be-useful idea of what's around you. You see the world as being sharp and stable and consistent even though the literal visual signals going from your eyes to your brain aren't... because the world is sharp and stable and consistent. Or at least it's enough those things that it was useful for the brain to evolve to generate that specific perceptual experience. The signals coming from your eye are just (some of) the information the brain uses to generate that experience.