Patent ID: 9220404
Filing Date: 2015-12-29
Classification: A61B,A61F,G09B

Abstract:
1. A method of modeling a lens of an eye having a cornea, the method comprising: measuring an anterior shape of the cornea; performing a first type of direct optical measurement of a first parameter of the cornea and performing a second type of direct optical measurement of a second parameter of the cornea, the first type of direct optical measurement being different from the second; performing the first type of direct optical measurement of a first parameter of the lens and performing the second type of direct optical measurement of a second parameter of the lens; the first type of direct optical measurement being different from the second; determining from the first and second parameters of the cornea and first and second parameters of the lens, a refractive index of the cornea; correcting the first and second types of direct optical measurements of the first and second parameters of the cornea and first and second parameters of the lens to form corrected measurements of the lens parameters and the cornea parameters by accounting for an effect of the refractive index of the cornea on the first and second type of direct optical measurements of the cornea parameters and the lens parameters; measuring at least one of an aberration of the eye and a refraction of the eye; calculating a refractive index of the lens by combining the corrected first and second types of direct optical measurements of the first and second parameters of the cornea and first and second parameters of the lens and at least one of the measured aberration and the refraction of the eye; and correcting the first and second types of direct optical measurements of the first and second parameters of the cornea and first and second parameters of the lens to account for an effect of the refractive index of the lens on the direct optical measurements of the first and second parameters of the cornea and first and second parameters of the lens.