When you wake up in the morning (or tired)...

[harold08]

Does anyone here know what the yellow stuff that is stuck around your eyes and eyebrows when you first wake up in the morning?
Could they be indicators of how much you've strained while you were asleep?

[cheerio]

Does anyone here know what the yellow stuff that is stuck around your eyes and eyebrows when you first wake up in the morning?
Could they be indicators of how much you've strained while you were asleep?

Gosh I've been wondering this for so long. I assumed all the gunk that gets in your eye (like dust and dead skin or something) is being forced out but I really have no idea!

Edit: A search on google for "eye gunk" gives a heck lot of ideas