Marie your posts and replies here and elsewhere are so inspiring to so many, don't ever hesitate to keep a worry to yourself as I know we all would want to offer what love,advice or support we can to you.
I really don't know a lot about this condition except my aunt did have surgery for it at a late age and was fine...she still see's better than I do at eighty three!!
We're all sending huge hugs and positive vibes right to you and will be praying for a good outcome for you sister