Planets Polarized Variable Vectograph has a range of 10,500 seconds of arc stereopsis depth. Planet images above, below, and even with the image at +940 to +5,900 seconds of arc & -1,520 to -5,400 seconds of arc. 16-diopter range for base-in (divergence) training and 24-diopter range for base-out (convergence) training for a total accommodation range of 40 diopters.