Mean value of B₄ parameter in the region of the barlens (isophotal radius in range (0.3–1.0) a_bl) is displayed as a function of galaxy inclination. The red and green symbols indicate galaxies that have been judged boxy and non-boxy based on visual inspection of the isophotes and the B₄ profiles. The filled circles show the same parameter measured from the synthetic images for the simulation model with B/D = 0.08. The error bars in the observation points correspond to ± one standard deviation of B₄ in the measurement region.