5 things you need to know about your eye’s tears

The National Eye Institute reports that there are now more than 100,000 Americans who have had a major eye operation because of tears.

They are all women and children of color, but they all share one common trait: they all have severe vision loss.

They have tears that last for hours, even days.

They can’t see at all, and they are not expected to get better.

This article originally appeared on Newsweek.com.