I have Sjogrens and had the dry eyes a lot longer than the dry lips/mouth. I've experimented with lip balms, salves, chapstick etc. As far as becoming addicted to something, well yes, I am addicted to anything that will give my lips some relief. I think Vaseline is as good as anything.
When I'm in a health food store or the like, I might stock up on several different kinds of lip stuff. I keep one in every coat pocket, car, room in the house etc. I think you could use vaseline til the cows come home and it wouldn't hurt a thing. My eye doctor warned me not to use "whatever the addictive stuff is for lips." He should stick to eye stuff. What feels best for you is probably just fine.
Don't trust any refractive surgeon with YOUR eyes.
The Dry Eye Queen