I started wearing contact lenses and realized I can't sleep with them else my eyes are bloodshot, because not enough oxgyen reaches them.I can only think of one answer: when we close our eyes blood vessels in our eyelids supply the oxygen needed.
Answer:
Your eyes are never fully closed when sleeping. Plus they get it from the oxygen in your veins.
Tears supply the oxygen when we sleep to the outer surface. The eye itself is supplied by blood vessels.
When you sleep your eyes are not glued **** meaning there is oxygen!
Did your doctor ever warn you about sleeping in your lenses? It's because a lack of oxygen to the eyes can cause problems when wearing ordinary extended wear lenses overnight. To sleep safely in soft contact lenses, you need an extraordinary lens that given the eye all the oxygen it needs to stay healthy.
With a breakthrough lens material, new NIGHT %26 DAY lenses allow up to 6 times more oxygen through to your eyes than ordinary soft contact lenses. Your eyes will be able to breathe as well as if you weren't wearing lenses at all-even while asleep
Why is it important for oxygen and water to pass through the lens to the eye?
Oxygen is essential for corneal health. Insufficient oxygen compromises normal eye function and may cause the cornea to swell. While minimal swelling is common during sleep, even in people who do not wear contact lenses, sleeping in ordinary contact lenses substantially reduces oxygen supply to the eyes which can cause the cornea to swell significantly and often results in very irritated eyes and uncomfortable lens wear
r eyes are not tightly sealed or fused shut while sleeping , we are in a relaxed phase and i eyes are slighty shut where o2 makes it's way in the eye
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