fossilesquedual immunity (see body)
smegwe need to maintain vision basically 24/7
I don’t know about OP, but I tend to close my eyes when I sleep
But if a bear wakes you up in the middle of the night, it’s pretty helpful to have your eyesight maintained, even while sleeping, in order to just wake up and go
I’ve never been wakened by a bear, but so many times by babies! Not lately, bc I’m old and they somehow survived to adulthood. But I’m glad my sleep deprivation was not compounded by blindness.
…or bears.