how does sleep cure bloodshot eyes?
In: Biology
Lack of sleep => Strained eyes due to constant usage => blood vessle dilates.
Its not that blood is rushing to your eyes, the blood vessel is always there, however, under normal circumstances, it’s only noticeable when you get close. However, when stressed or super tired. The blood vessel expands, making the eyes overall reddish.
Sleeping refreshes the eyes thus returning the vessles back to their original width.
This is all assuming you didn’t pop a blood vessel and your eyes didnt actually get blood covered.
Optician here. Your eyes have a tear film on the surface that keeps them hydrated and oxidized. Throughout the day, your eyes get dry and bloodshot from heat, cold, wind, smoke, pollution, allergies, etc. When you sleep, your closed eyelids allow your tear film to rehydrate your cornea for several hours and provide plenty of oxygen to your tired blood vessels. Your entire body goes through restorative processes in your sleep, and your eyes do too.
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