  We apply the convergent close-coupling (CCC) formalism to the problem of
two-photon double ionization of helium. The electron-photon interaction is
treated perturbatively whereas the electron-electron interaction is included in
full. The integrated two-photon double ionization cross-section is
substantially below non-perturbative literature results. However, the pattern
of the angular correlation in the two-electron continuum is remarkably close to
the non-perturbative time-dependent close-coupling calculation of Hu {\em et
al} [J. Phys. {\bf B38}, L35 (2005)]
