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Simulation and experimental diffraction results for gratings with a periodicity of Λ = 925 nm on the contact lens surfaces in ambient humidity, fully hydrated, and artificial tear conditions. (a1) Simulated and (a2) experimental diffraction results for 450 nm wavelength at different humidity conditions. (b1) Simulated and (b2) experimental diffraction changes at 532 nm. (c1) Simulated and (c2) experimental diffraction for 635 nm. Scale bar = 5 cm.
