Rhonda Patrick· PhD
There was a study, I think it was in Switzerland, where they'd had a eye mask, just an just a plain old cloth eye mask, and they had a placebo eye mask where they cut the holes out in the middle. Same strap, just cut the holes out. Improved sleep consolidation during the night. These weren't college students, so they were in sort of noisy environments anyway, but consolidated their sleep better in the night, translated to better test scores the next day.