OK, more details:
Your eyelids function as windshield wipers for your eyes. It removes debris and spreads lubrication. The inner surface of the eyelid matches perfectly with the surface of your eye.
Lasik will reshape your corneas, so there’ll be some mismatch between your corneas and your eyelids. This accounts for the dry and itchy eyes some experience post-procedure. Thing is, your eyelids will reshape to match your corneas – isn’t that fucking amazing?

I think it reshapes faster the younger you are. I had mine at 50 and used artificial tears for just over 6 months.
One more thing (at least for now): If you have the procedure you’ll have to follow an eye drop regimen for about 5 days (steroids and antibiotic). DO NOT tilt your head back to apply the drops; instead lie down and apply. I strained my neck so badly from tilting my head back – it felt like a headache on the outside of my head.
