There is a Zernike Sag surface in non-sequential mode, you may use it to represent the irregualr surface feature. Of course this would not be the same as the actual insertion of the real lens or surface as this surface has no thickness. If you could have some Zernike coefficient data (such as from Zygo) you may be able to implement the irregularity of the surface. {d,~=s0T
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