My left eyelid has been hanging a lot more than my right one for about a year.
It does not block my vision but it hangs just above the pupil so I'm afraid that if it gets worse it will block some vision.
I'm wondering why this has happened (I'm 21 and have only suffered from this for about a year). I haven't been through anything that would have caused this that I know of.
Some information that might be useful: I wear contact lenses almost everyday and have been for 6+ years.