Paradoxically, blurry morning eyes can mean dry eyes. You’d think closed eyes would be moist, right? Wrong.
Some people don’t fully close their eyes at night. It’s called “nocturnal lagophthalmos.” It’s fancy talk for “sleeping with your eyes slightly open.”
This exposes your cornea to air all night. That creates a dry patch. And a dry patch blurs everything until you rehydrate it.
Are You a Mouth Breather?
Here’s a weird one. Sleeping with your mouth open dries out your eyes. How? It changes your face’s air flow.
Air moves up from your open mouth. It blasts your eyeballs all night. Your tear film evaporates like a puddle in the desert.
Quirky detail: Some people tape their mouths shut to fix this. Not kidding. It’s a thing.
