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Schematic illustration of the Mini WELL Ready. a) D1 is shown in green, D2 in red, and D3 in blue. b) In D1, the central rays (Fc, green) come into focus behind the peripheral rays (Fp, green), while in D2, the central rays (Fc, red) come into focus in front of peripheral rays (Fp, red). LSA = Longitudinal spherical aberration; EDOF = Extended-depth-of-focus
