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Space-variable analysis of infrared eccentric photorefraction

Minshan Jiang, Ming Chang, Xuedian Zhang

Based on Fourier optics and the assumption of the isotropic scattering of retina, the crescent formation and light-intensity distribution of the pupil image of a myopic eye using eccentric photorefraction are presented in this paper. In the case of improved infrared eccentric photorefraction, the simulation results are compared with those obtained by normal geometrical analysis, which shows the feasibility and predominance of spacevariable analysis. The new method not only accuratelylocates the boundary of dark zone, whose width and center are necessary to calculate refractive errors, but also can be generalized to other space-variable systems