Video: What are eye crusties made of?
![Credit: The American Chemical Society What are eye crusties made of? (video)](https://scx1.b-cdn.net/csz/news/800a/2018/whatareeyecr.jpg)
The substance that builds up in the corners of your eyes as you sleep has a variety of colloquial names: eye crusties, sleep, eye dust.
But why does it appear every morning? And what is it actually made of?
In this video, Reactions explains the chemistry of eye crusties:
Provided by American Chemical Society