Well, I quite understand your anxiety over the possibility of having dry eyes because of depressive mood. So, as a matter of fact, there is no direct relationship between a pair of dry eyes and depressive mood. However, it is noticeable that depression could indirectly lead to some disorder of our body, eyes, and physical condition, thus, indirectly cause dry eyes, but this is nearly impossible. Anyway, you gotta pay more attention to your eyes, maybe artificial tears and other special eye drops could help you out of this problem.