The characterization of the Fermi-LAT point-spread function (PSF) is critical for the accurate analysis of point sources in LAT data. Precise characterization of the PSF is of particular importance for the detection of weak angular extension in LAT sources such as could be associated with the signature of pair halos around hard-spectrum AGN. We report on a verification of the LAT PSF with the current LAT data release (Pass 7) and a new data release generated with an improved instrument calibration. We present a methodology for deriving an on-orbit PSF model by adjusting the parameters of the Monte Carlo PSF model. We compare this on-orbit PSF model with a sample of PSF calibration sources including pulsars and AGN.