You are welcome. The very core of this dream is about, very simply, unconscious material becoming conscious.
You are becoming aware of something (looking at eye) about yourself (mirror) that has been lurking just beneath the surface of your awareness. Or, stated a bit differently, you have been "self reflecting", thinking about your inner nature (looking into eye), and discovering/uncovering some obstruction, something about yourself that you were not concerned about or aware of previously. Some bit of material from your unconscious (piece of black) is becoming conscious (eyeball) ... or perhaps you are beginning to understand something that eluded you before in some way.
The moth is a lunar symbol, associated with the butterfly symbolically, but with the "night side" of it. Therefore, perhaps this unconscious material has to do with emotions, or cycles, or receptivity - something associated with the moon ... or perhaps "seeking the light", or being "blinded by the light" (as moths are typically self-destructive this way).
Whatever this unconscious material/energy is, at least it appears that you are aware, or becoming aware, of it (looked at it on sink) ... and perhaps it is good that the moth was dead? A "dead issue"? Something removed and gone forever?
Does any of this make sense? There are so many different ways to arrange the various elements in this dream that I am kind of shooting in the dark where any detail is concerned.
So, what do you "see" now that you did not "see" before?
... also, how did you feel in the dream. That in itself can tell volumes.