Light-intensity distribution in eccentric photorefraction crescents.
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Light-intensity distribution in eccentric photorefraction crescents. / Kusel, Reinhard; Oechsner, U; Wesemann, W; Russlies, S; Irmer, E M; Rassow, B.
in: J OPT SOC AM A, Jahrgang 15, Nr. 6, 6, 1998, S. 1500-1511.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - Light-intensity distribution in eccentric photorefraction crescents.
AU - Kusel, Reinhard
AU - Oechsner, U
AU - Wesemann, W
AU - Russlies, S
AU - Irmer, E M
AU - Rassow, B
PY - 1998
Y1 - 1998
N2 - We try to improve the accuracy of eccentric photorefraction by taking more information into account than just the size and tilt of the crescent. Based on Gaussian optics and the assumption of an isotropic scattering retina, a theoretical analysis of the light-intensity distribution in the pupils of astigmatic eyes is presented. The method is applied to different photorefractor setups (point light source, long linear light source, knife-edge aperture, and circular aperture). In the case of a knife-edge aperture the crescent structure can be formulated analytically. In the case of a circular aperture an analytic description is possible only for spherical refractive errors, but astigmatic refractive errors can be determined from crescent parameters with neural networks.
AB - We try to improve the accuracy of eccentric photorefraction by taking more information into account than just the size and tilt of the crescent. Based on Gaussian optics and the assumption of an isotropic scattering retina, a theoretical analysis of the light-intensity distribution in the pupils of astigmatic eyes is presented. The method is applied to different photorefractor setups (point light source, long linear light source, knife-edge aperture, and circular aperture). In the case of a knife-edge aperture the crescent structure can be formulated analytically. In the case of a circular aperture an analytic description is possible only for spherical refractive errors, but astigmatic refractive errors can be determined from crescent parameters with neural networks.
M3 - SCORING: Zeitschriftenaufsatz
VL - 15
SP - 1500
EP - 1511
JO - J OPT SOC AM A
JF - J OPT SOC AM A
SN - 1084-7529
IS - 6
M1 - 6
ER -
