Hi. I'm online and happy to answer your question today.
yes. Since she has already suffered for so long I would expect that she has already had her tear ducts closed (punctal occlusion). The next step would be a temporary lateral tarsorrhaphy. If this temporary procedure works it can easily be made permanent.
Here is a good article that discusses this procedure:
Any ophthalmologist would be able to assist your sister with this surgery.
Does this make sense to you?
I see that you are offline. I'll switch over to the Q&A system. This system works a lot like 'text messaging' but an email is sent to each of us anytime something is posted to this thread. We can continue to work on your question there..... :)