Estimation of the IQ at the focal plane of an 8m telescope as a function of the wavelength under a ε₀ of 1.0 (left) and 0.7 (right) arcsec at 5000 Å, considering four different wavelength behaviors of the dome-turbulence (blue lines) contribution: (1) ε_dome=0 (solid green line), and (2, 3, and 4) ε_dome=0.2 arcsec at 5000 Å, with a power-law wavelength dependence of index γ=3 (2, dotted lines), γ=11/3 (3, dashed lines), and γ = 4 (4, dot-dashed lines). We assumed a typical ${ℒ}_0$ value of 22 m. The black solid curve follows the ε₀ wavelength dependence (ε₀ ∝ λ^−1/5). The upper panels depict the general spectral range covered by instruments in ground-based optical-infrared observatories. The lower panels specifically showcase the spectral range of the MUSE integral field spectrograph, the selected instrument for implementing the proposed methodology on real data.