My Westie has been diagnosed with dry
eye and was prescribed a dog ointment, in a very small tube. The vet
cost was typical, the test was a simple "wick" test and while the medication is expensive, about $35 and I use it only every other day or so, watching to see if my dog show dry eye symptoms. The vet suggested twice a day, but I think that was a worse case prescription. The one tube has lasted a couple of months and looks to be good for a couple more.