Okay, i've created a driven key for the blinking of my eyelids.., then created a lattice to deform the eyes to the way they should look, and still keep the same blinking ability. the same lattice is deforming the eye and i've got an aim contraint so that i can move it wher ei want it and it maintains the proper shape.
The problem is, when i aim the eye, the pupil gets distored by the lattice (see photo)
Is there a way to have the pupil follow the eye deformation, but not have it be deformed by the lattice? in otherwords, i want it to move with the eye, and stay on the surface, but i don't want it to be deformed the way that the lattice wants to deform it. i want to maintain the shape of the pupil.

any help would be great.