Patent ID: 6045225
Filing Date: 2000-04-04
Classification: A61B

Abstract:
An optometric apparatus for obtaining a correction power correcting ametropia based on a refractive power of a subject eye, said apparatus comprising:data input means for inputting a perfect correction power of a subject eye and adjustment factor data for adjusting the correction power;program storing means for storing a program used for estimating a prescription power by making adjustments to the correction power in relation to the perfect correction power on the basis of the adjustment factor data inputted by said data input means, said program including a step of obtaining a correction amount used in making adjustments to the correction power;data storing means for storing a multiplicity of actual prescription powers, and perfect correction powers and adjustment factor data on the basis of which an examiner determined the actual prescription power in the past, respectively;first calculating means for obtaining a variable coefficient for making variable the correction amount in said program by statistically processing a multiplicity of data stored in said data storing means;program advancing means for advancing said program;second calculating means for determining an estimated prescription power in accordance with said program and on the basis of the variable correction amount obtained by said first calculating means; anddisplay means for displaying the estimated prescription power determined by said second calculating means.