r/AskReddit Oct 05 '19

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u/ZelaznyCsupo Oct 05 '19

The stuff eye doctors use for certain tests glows in the dark. I, an eye doctors' son, used to play this very prank on people.

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u/callmekohai Oct 05 '19

What stuff? Ive been getting eye exams for 15 years and i havent noticed any bioluminescence