How do I rotate a bone that eyes follow?


I’ve got a pair of eyes that follow the rotation of a single bone. Works well, but I’d like the bone, which points sideways & down while the eyes face forward, to face in the same direction as the eyes.

I can’t for the life of me work out how to rotate the controller bone in a new direction, without the eyes following.

Is there any way of doing this, or am I stuck with the situation?