Is there a bad odor?
How about lice/mites around the crest, face/eyes have you noticed any on the body?
Can he eat o.k.? His beak is a bit overgrown, but if he's not having issues, then I'd not worry with the beak right now.
His crest is interesting, can you get some photos of the other side too?
I have to ask, is it stiff and crunchy like it looks in the photos or is that ointment or something?
He's an old fella isn't he! What's his name?
For the eyes, I'd gently cleanse with saline. If you have Terramycin eye ointment, place a dot of ointment in each eye. Do this at least once daily.