UNIVERSAL OBJECTIVE REFRACTION

摘要

The determination of objective refraction data for an eye of a spectacle wearer, wherein based on measured data for the eye of the spectacle wearer, which determine at least one first set of Zernike coefficients of a wave front aberration for a long accommodation and a second set of Zernike coefficients of a wave front aberration for a short accommodation of the eye, objective refraction data for sphere (SphNcorr), cylinder (CylNcorr) and axis position (AxisNcorr) of the eye for close viewing is determined such that the objective refraction data satisfies equations;SphNcorr=MNcorr+(JN,0corr)2+(JN,45corr)2,CylNcorr=-2(JN,0corr)2+(JN,45corr)2andAxisNcorr=12arctan(-JN,0corr,-JN,45corr)+π2;for a corrected power vector PNcorr for near viewing, wherein said corrected power vector PNcorr corresponds, based on a difference;ΔP=(ΔMΔJ)=PN-PF;between a first power vector;PF=(MFJF);and a second power vector;PN=(MNJN)to the value;PN-(A1N00),;when ΔM>A1N; and
to the value;PF+A1NΔM(0ΔJ),;when ΔM≦A1N,

wherein
;A1N=-1d;is the spherical equivalent of a predetermined object distance d for close viewing.

主权项

1. A method for objective refraction determination for an eye of a spectacle wearer, comprising:
collecting measurement data for the eye of the spectacle wearer, which data specifies at least a first set of Zernike coefficients c2,F0, c2,F2 and c2,F−2 for describing a wavefront aberration for a distance accommodation of the eye and a pupil radius r0 of a situation of wear, as well as a second set of Zernike coefficients c2,N0, c2,N2 and c2,N−2 for describing a wavefront aberration for a near accommodation of the eye and the pupil radius r0 of a situation of wear; determining objective refraction data for sphere SphNcorr, cylinder CylNcorr, and cylinder axis AxisNcorr of the eye for near vision such that the objective refraction data, in dependence on the first and second set of Zernike coefficients, satisfies the equationsSphNcorr=MNcorr+(JN,0corr)2+(JN,45corr)2CylNcorr=-2(JN,0corr)2+(JN,45corr)2AxisNcorr=12arctan(-JN,0corr,-JN,45corr)+π2for a corrected power vectorPNcorr=(MNcorrJN,0corrJN,45corr)for near vision, wherein the corrected power vector PNcorr, in dependence on a differenceΔP=(ΔMΔJ)=PN-PFbetween a first power vectorPF=(MFJF)=(-43r02c2,F0-26r02c2,F2-26r02c2,F-2)and a second power vectorPN=(MNJN)=(-43r02c2,N0-26r02c2,N2-26r02c2,N-2) corresponds to the valuePN-(A1N00),if ΔM>A1N; and
corresponds to the valuePF+A1NΔM(0ΔJ),if ΔM≦A1N,whereinA1N=-1dis the spherical equivalent of a predetermined object distance d for near vision, and whereinarctan(x,y):={arctan(y/x),x>0arctan(y/x)+π,x<0,y>0arctan(y/x)-π,x<0,y<0π/2,x=0,y>0-π/2,x=0,y<0.