Multifocal ophthalmic lens

Abstract

A multifocal ophthalmic lens comprising a far vision region, a near vision region and an intermediate vision region is provided having a high near vision region and a wide vision field in the near vision region, the intermediate vision region and in the far vision region. Progression is gentle although the distance between a mounting center on the lens and the point where power addition is 85% higher than power addition at a far vision control point is less than 16 mm, while simultaneously maximum cylinder inside a 20 mm radius circle centered on a geometrical center of the lens is kept at a low value.

Description

technical field [0001] The present invention relates to a multifocal eye lens having an aspheric surface having a mean sphere and a cylinder at each point on the aspheric surface. Background technique [0002] Such lenses are already well known; among multifocal lenses, a distinction can be made between lenses suitable for all-distance vision, known as progressive lenses, and lenses dedicated more specifically for near-distance and intermediate-distance vision. [0003] The progressive multi-focal eye lens includes a distance viewing zone, a near viewing zone, a middle distance viewing zone and a gradual main meridian passing through the three viewing zones. French patent application 2,699,294, incorporated herein by reference, describes in its introduction the elements of the progressive multifocal eye lens (gradient main meridian, distance vision zone, near distance vision zone, etc.) work done in comfort. [0004] In order to better meet the viewing needs of hyperopic p...

AI Technical Summary

Problems solved by technology

Wearers of multifocal lenses actually often experience discomfort during dynamic viewing

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