National quality video open class (5) : "modern people" prone to eye disease - dry eye

Dry eyes, actually in our lives, a lot of people have it, but a lot of people don't deal with it, and yet it does affect the quality of your life. So, just dry eyes and uncomfortable eyes are dry eyes?How is it defined and how is it caused?How can we effectively prevent it? This series of videos won the first prize of the National Education and Teaching Grand Prix and the National Excellent Video Open Course Award.