I recently had catarac surgery 1/25/17 and since then, one of my eyes which were operated on is not functioning properly. There is like a half moon on the outside of my retina (left side and it decreases my vision and feels swollen all the time I am being treated for dry eye for this condition and am on my 4th drop therapy, none of which seem to correct this. I receive a little relief after drops, but the half moon comes back within an hour or so. I am now on Xiildra. I think something is wrong with my retina.