METHOD FOR DETERMINING THE CONFIGURATION OF AN OPHTHALMIC LENS, OPHTHALMIC LENS PRODUCED ACCORDING TO SAID METHOD, AND METHOD FOR PRODUCING SAID LENS

摘要

The invention relates to a method for determining the configuration of an ophthalmic lens for increasing the depth of the field of vision of the user. Said method comprises steps of determining the form of a base optical corrective element according to at least one of the following parameters: the desired power of the opthalmic lens; the desired resolution or modulation transfer function FTM; the desired extent of the correction of spherical aberrations of said ophthalmic lens; the desired extent of the correction of spherical aberrations of the cornea of the user; the desired extent of the correction of the chromatic aberrations of the ophthalmic lens; the desired extent of the correction of chromatic aberrations of the cornea of the user; or the desired extent of the correction of higher-order aberrations (HOA). Said method also comprises a step of determining the profile of a diffractive phase distribution structure, said determination comprising steps of defining a desired focalisation depth of said ophthalmic lens; a step of calculating the phase distribution from the desired depth of focalisation; a step of finding phases which minimise the differences between the effective phase distribution and the desired phase distribution; and a step of converting the phase data into geometrical data in such a way as to define the profile of the diffractive phase distribution structure. The method further comprises a step for juxtaposing the diffractive structure and the base optical corrective element. The invention also relates to a lens obtained according to the above-mentioned method, and to a method for producing such a lens.