As an eye doctor, I see so much patients coming in for red eyes and eye pain.
And guess what the #1 cause is?
Yes. This is the explanation I like using.
Your tears lubricate your eyes - meaning, it allows your eyelids to glide over your cornea. If your eyes are dry, your eyelid is going to scratch and rub your corneas more. This will cause eye pain, and ironically REFLEX tearing.
Don't let that happen.
Watch this video here to learn tips on how to take care of dry eyes.