Axis ratios of galaxies as a function of redshifts in different samples. Left: Axis ratio of passive galaxies with M_⋆ = 10^11.2 − 10^11.3 M_⊙ from the SDSS as a function of redshift. The red dots are the median for every 1000 sources. The black dash line denotes the mass-complete redshift. Middle: Axis ratio of passive galaxies with M_⋆ = 10^11.5 − 10^11.7 M_⊙ from the SDSS. Right: Axis ratio of the passive galaxies from the SDSS and the ACS-GC. The galaxies from SDSS are with M_⋆ = 10^11.2 − 10^11.3 M_⊙ and marked with blue crosses, while the galaxies from the ACS-GC are with M_⋆ = 10¹¹ − 10^11.5 M_⊙ and marked with blue triangles. The median q of sources from the ACS-GC are calculated for every 100 sources.