Controllers

• In setting up a controller for an object in a scene. In this case an animated eyeball:

1) set up your nested layer with the parent spline (controller1) and child spline (controller2)

2) child spline (controller) will parent the animated object; animated object must not be in the nested layer; otherwise it will transform the same way the 

3) right-click child spline and select "wire parameters"; select for your child spline (controller2) to move in z position and then, select for your object to rotate either x, y, or z rotation
4) connecting controller to object and inserting "degtorad" next to the (xyz) positions/rotations

as you can see, the degtorad is applied