  An analysis of spinor redefinitions in the context of the Lorentz-violating
QED extension is performed. Certain parameters that apparently violate Lorentz
invariance are found to be physically irrelevant as they can be removed from
the lagrangian using an appropriate redefinition of the spinor field
components. It is shown that conserved currents may be defined using a modified
action of the complex extension of the Lorentz group on the redefined spinors.
This implies a natural correspondence between the apparently Lorentz-violating
theory and conventional QED. Redefinitions involving derivatives are shown to
relate certain terms in the QED extension to lagrangians involving nonlocal
interactions or skewed coordinate systems. The redundant parameters in the QED
extension are identified and the lagrangian is rewritten in terms of physically
relevant coupling constants. The resulting lagrangian contains only physically
relevant parameters and transforms conventionally under Lorentz
transformations.
