Paulie's got the right of it. You mainly need to watch out for dry eyes as if untreated, that can cause serious problems.
Ectropian can wreak havoc with your eyes' ability to stay moist so that's why there's always concern about how severe someone's ectropian is, whether it will stabilize or continue to get worse, etc. and so forth.
When I was growing up, my ectropian continued to get worse until about age 13. Until it stabilized, we were concerned that I might lose my sight. Thank goodness it stabilized.
I'm sure some of you know this, but I didn't! You can directly moisturize the exposed eyelid with something like petroleum jelly. Tracy mentioned this to me at the conference and I'm so grateful. I thought I shouldn't put anything on my eyelids but being able to moisturize that keeps me a lot more comfortable. Like I said, many if not all of you may already know this, but I didn't so I thought I'd bring it up on the off chance someone else didn't know. I would recommend being really careful about doing this - ie, make sure you do it in front of a brightly lit mirror, make sure you're using petroleum jelly that's not contaminated with anything else, etc. and so forth.
I am female, and was born in 1972 with Lamellar Ichthyosis.