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(a) The axial PSF of the OCT measured experimentally by a mirror in the sample arm shown in blue, the PSF estimated theoretically from the envelope of spectral interference fringes shown in dashed red. The FWHM of the axial PSF is estimated to be 1.52 μm in air which corresponds to 1.11 μm in corneal tissue. (b) Sensitivity roll off of the system evaluated by measuring the axial PSF at different depths.
