Your eyes are squishy. They’re full of vitreous fluid inside so they’re like grapes in a way. Plus you hear sounds in your own head louder than most things. Dont push on your eyeballs, it’s not good for them.
Squeaking may be from muscles around the eye or it could be the muscle in your fingers you’re hearing.
That’s a guess though because honestly I’ve never heard of squeaky eyes.
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