Crohn's and Sjogren's

I went to my eye doctor and he put me on steriod drops for an inflamed cornea.  I knew my eyes were dry and have been for quite a while.  Well, after 10 days of steroid drops they did not improve, still have inflammation there, so he thinks I have sjogren's (another immune condition) and referred me to a Specialist.  It may take a while to get an appointment, but I was wondering if the chronic diarrhea and dehydration could dry out my eyes in the same way and stick around? God only knows that I do not want another disease or condition!