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I might mention that, believe it or don't - a living skull is translucent, and our brains can detect light all by themselves. So a mask is good, but not nec a whole solution.

In old experiments, just the light coming in under a door diminished melatonin in mice.

The skull itself? That seems implausible. Something on the skin other than the eyes seems more likely.

I thought the same, then I got an eye mask. It is still noticeable.

Now, I make no claims that it is necessary to be that dark. I have no idea.

>Research studies indicate that about 1 in 20 people do not shut their eyes while sleeping.

https://www.sleepfoundation.org/physical-health/sleeping-wit...