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[–] 20 points 2 months ago* (last edited 2 months ago)

Checked with my wife who is an optometrist, and she said cornea.

Edit:

She added, "cornea has more nerve endings"

Edit 2:

She also added that the inside of your eyelid is a mucus membrane, so soap is no more irritating to it than it would be to the inside of your mouth.

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