Anyone know what to use for the dark eyed look with the mask?
I know they placed some kind of mesh for the H4 and H6 mask.
You could always wear a black stocking. 
Good idea. What about puting some mesh over the eyes and gluing it?
Depends, while wearing the mask, I’m not really sure if I can help you. But for display, I use either back pantyhose or black duck tape on the mask mount.
What I do to give my self a blacked out eye look when wearing my mask for haunts is putting black eye make up around my eyes, Works perfect for the dark night setting and is not permanent where as gluing mesh on the eyes is.
I just wear a black bacalava, it shades your eyes some and more importantly it keeps most of the sweat off the inside. 
The panty hose sounds good