8/29/2023 0 Comments Spherical aberration seidel sumThe resultant refractive coupling has to be taken into consideration especially when treating eyes with an abnormal corneal shape and/or large pupil center to corneal vertex chord. (4) Conclusion: The results can act as a guide for the clinician, in order to readily assess theoretical impact of wavefront map translation from pupil center to the visual axis. A theoretical quantitative relationship between SA, coma, astigmatism and defocus is presented under the influence of translation. The translation of +0.4 µm of coma (C) by +0.25 mm with a pupil diameter of 6 mm resulted in induction of tilt (C), −0.13D defocus (C) and +0.13D astigmatism (C). (3) Results: The translation of +0.40 µm of SA (C) by +0.25 mm with a pupil diameter of 6mm resulted in induction of tilt (C), −0.03D defocus (C), +0.03D astigmatism (C) and +0.21 µm coma (C). The relationship amongst Zernike representations of various aberrations was analyzed under the influence of translation. The effect of translation (0 to +1 mm) was analyzed for SA (0 to +2 µm) and coma (0 to +2 µm) for a circular pupil of 6 mm, without any rotation or scaling effect. (2) Methods: A computer software algorithm was implemented based on previously published methods. (1) Background: The purpose of the study is to present a simple theoretical account of the effect of translation of coma and spherical aberrations (SA) on refractive error and higher order aberrations.
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