...And others just can't use oil at all!
I've just become aware that some people (e.g. me) can't use Restasis or Endura (I too think they're identical except for the Cyclosporine), because it's counterindicated.
For those whose dry eye comes from an overabundance of meibomian oils instead of a shortage, oil-based drops like Endura/Restasis will make it worse!
I'm not making this up -- both the ophthamologists who examined me came to the same conclusion about my eyes.
My current doc, Dr. Michel Guillon (recommended) commented that if people with Ocular Surface problems were more accurately diagnosed in the first place, the Restasis trials would have much more success...on those who actually had a use for it!
Blepharitis leads to MGD causes dry eye?
Dry eye drops cause eyelid irritation exacerbating Blepharitis?