That's what is happening with her,,the eyelid is sometmes over 1/2 the eye..
Yes, Raph has had that since the day I got him. I got Raph on July 15thof last year, and he's now almost a year old (his b/day is on the 23rdof Feb). His third eyelid has been showing almost constantly, though some days it covers more of the eye than others. I haven't seen it cover almost half of his eye, but it can still be quite prominent.
I tried to find a pic I could show you of it, but it's not really visible in the ones I've taken of him. Here's three though, to give you an idea:
This first one shows the third eyelid a bit...along with that crusty white stuff that forms in the corner at times (these were all taken not long after I got him):
This second one shows more of the size of his eye, which my vet though was unusually large. I don't know if that's true, if it's a trait of English lops, or if that could be the reason why the third eyelid becomes prominent:
And this last one is blurry, but it shows the third eyelid more. This pic reflects how prominent Raph's 3rd eyelid is most of the time:
I don't know if it's something to be concerned about...maybe it's a hereditary trait? I always took it to be just another oddity that Raph has, but perhaps it is a sign of something. My vet didn't seem concerned (though the knowledge of rabbits that he professes to have has gone way down in my books lately...).
If I find out anything more I'll let you know...