Zernike Pupil Transform Analyzer
Zernike Pupil Transform Analyzer
This interactive tool computes the analytical transformation of Zernike wavefront coefficients (OSA/ANSI standard, up to 8th radial order) when the analysis pupil changes in diameter and/or centration. Starting from an arbitrary set of coefficients, it derives the exact re-expanded coefficients for the new pupil geometry — with no numerical interpolation or approximation. The tool also computes objective refraction (sphere, cylinder, axis) before and after transformation, and simulates retinal image quality through PSF convolution (monochromatic or polychromatic) on a letter optotype, allowing direct visualization of the optical consequences of pupil changes. Applications include studying how mesopic-to-photopic pupil constriction alters higher-order aberrations, evaluating the impact of a decentered optical zone after refractive surgery, or teaching wavefront optics. It is intended as a research, clinical decision-support, and teaching tool for ophthalmologists and vision scientists.
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