Ophthalmic lens comprising a layer having a variable...

G - Physics – 02 – C

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G02C 7/02 (2006.01)

Patent

CA 2604929

An ophthalmic lens (10) comprises an optical component (1) and a layer (2) placed on a face of the optical component (1a). The layer (2) has a variable refractive index and is structured so that a second order derivative of the index with regard to a linear spatial coordinate along the face of the optical component (1a) is greater than a fixed threshold. The layer (2) makes it possible to alter the optical power and astigmatism of the lens (10) with regard to corresponding values only relative to the optical component (1). In the event that the ophthalmic lens (10) is a progressive lens, the layer (2) makes it possible to change an addition, a length of progression and/or a design of the progressive lens.

Un verre ophtalmique (10) comprend un composant optique (1 ) et une couche (2) disposée sur une face du composant optique (1a). La couche (2) possède un indice de réfraction variable et est structurée de sorte qu'une dérivée de deuxième ordre de l'indice par rapport à une coordonnée spatiale linéaire le long de la face du composant optique (1a) est supérieure à un seuil fixé. La couche (2) permet de modifier la puissance optique et l'astigmatisme du verre (10), par rapport à des valeurs correspondantes relatives seulement au composant optique (1). Lorsque le verre ophtalmique (10) est un verre progressif, la couche (2) permet de modifier une addition, une longueur de progression et/ou un design du verre progressif.

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