From history i can find out that you are having dry eyes and episcleritis
with joint involvement.
Episcleritis is usually recurrent and it is rarely associated with connective tissue
diseases. Since you have already been evaluated and tested negative for connective tissue diseases, the main treatment is by steroid eye drops like loteprednol. If it is not responding oral steroids
can be used.
Since you have got dry eyes also, even dry can cause pain and redness
of eyes and it is also known to be associated with connective tissue diseases. For dry eye you are on treatment with tear substitutes. I advice you to undergo dry eye evaluation to find out the type of dry eye to consider further options in treatment like cyclosporine
eye drops,methods of tear preservation and so many.
I would like to advice you to undergo dry eye evaluation and modify the treatment for dry eye.