I'm sorry your pup and you are dealing with this condition. Contact MaddiesMommie:
http://www.yorkietalk.com/forums/member.php?u=19192710. Her girl had an extreme case that required surgery. She knows a lot about the various meds to deal with dry eye.
If you can, take your pup to an ophthalmologist to confirm the diagnosis and to determine the best treatment plan.
You may want to re-post your thread in the Sick & Injured forum to see if you get more responses.