Assuming that yawning produces tears in our eyes.
In: Biology
I don’t know about you, but my eyes dont pump out tears when i yawn.
However i can relate to when I actually had a lot of tears in my eyes, and at the time my sight was not clear at all.
The reason why your eyesight gets blurry is due to different refractive indices between air and water/tears. This bends the light before it enters your eyes and blurrs your vission.
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