K-band Strehl ratio (left) and FWHM in mas (right) with respect to the m_V = 12 reference source off-axis distance (in arcsec), obtained with the Fourier-based simulation in the good (top), median (middle), and bad (bottom) case turbulence conditions and for outer scale values of 25 m (solid lines), 50 m (dashed lines), and 100 m (dot-dashed lines). For each turbulence and outer scale case, FWHM is plotted for the radial and transversal cuts of the PSF.