Thanks guys. Amazing how a little touch of marker can do.
Jonn, the eyes are coated with CCG. It is a 3 steps process.
First, apply a small amount CCG thick onto the deer hair head, affix the eyes, then zap them with UV light to lock them in place.
Second, apply a generous amount of CCG thick around and over the eyes (you can also coat the entire head), then zap them with UV light.
Third, apply a thin coat of CCG hydro over the eyes, then zap them again with UV light.