Dispersion measured in each multiple system of the three main parameters measured: UV and Lyman-α extent, axis ratio, and spatial offset. We measured in each multiple systems the μ-weighted mean values and μ-weighted dispersion of values among the images. From left to right, we represent the dispersion of half-light radius (r₅₀) with respect to μ-weighted mean values, the dispersion of axis ratio (q) with respect to μ-weighted mean values and the dispersion of spatial offset (Δ_{Lyα − UV}) with respect to μ-weighted mean values. In each panel, the grey stars and squares represent two-image systems and the colored points show the three (or more) image systems. In the left and middle panels, the stars represents UV r₅₀ and q, respectively, along with the square Lyman-α values. In the right panel, the stars represent best model centroid offsets and green points represents the “peak to peak” offset values (see Sect. 4.3). In all panels, we plot the dashed lines to represent the 10%, 50%, and 100% error levels.