  We show that at long lengthscales and low energies and to leading order in
1/N expansion, the anisotropic QED in 2+1 dimensions renormalizes to an
isotropic limit. Consequently, the (Euclidean) relativistic invariance of the
theory is spontaneously restored at the isotropic critical point, characterized
by the anomalous dimension exponent of the Dirac fermion propagator $\eta$. We
find $\eta=16/3\pi^2 N$.
