How do we have the ability to blur our vision on command?
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It depends how you’re blurring your vision.
Squinting blurs your vision because you’ve quite literally shrunk the area that light can get into your eye. This decreases your eye’s ability to see.
If you focus on something super close to your face, you’re “blurring” your vision by taking advantage of a normal eye function. You’re just changing where you focus your eyes.
You can also “blur” your vision by crossing your eyes a little bit. When your brain receives two competing inputs from your eyes, it tends to “ignore” some of that information.
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