Ophthalmic lens element

G - Physics – 02 – C

Patent

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G02C 7/06 (2006.01)

Patent

CA 2663276

An ophthalmic lens (200) element is disclosed. The, ophthalmic lens element (200) includes a central region (102) of low surface astigmatism and a peripheral region (112). The central region (102) includes an upper viewing zone (104) for providing a first power suitable for a wearer's distance vision tasks. The peripheral region (112) has a positive power relative to the first power, and surrounds the central region (102). The peripheral region (112) provides an optical correction for retarding or arresting myopia for a wearer and includes one or more regions (110) of relatively higher surface astigmatism, a lower or near viewing zone (106) of low surface astigmatism, and a corridor of low surface (108) astigmatism having a surface power varying from that of the upper viewing zone (104) to that of the lower viewing zone (106). The lower viewing zone (106) is for a wearer's near vision tasks.

L'invention concerne un élément de lentille ophtalmique (200). Cet élément (200) comprend une zone centrale (102) ayant un astigmatisme de surface relativement bas et une zone périphérique (112). La zone centrale (102) comprend une zone de visualisation supérieure (104) destinée à fournir une première puissance utilisée pour des tâches de vision éloignées de celui qui le porte. La zone périphérique (112) possède une puissance positive par rapport à la première puissance, et entoure la zone centrale (102). Cette zone périphérique (112) offre une correction optique destinée à retarder ou à stopper la myopie de celui qui les portent et comprend un ou plusieurs zones (110) ayant un astigmatisme de surface relativement plus élevé, une zone de visualisation inférieure ou proche (106) ayant un astigmatisme de surface relativement bas, et un corridor ayant un astigmatisme de surface relativement bas (108) possédant une puissance de surface qui varie entre celle de la zone de visualisation supérieure (104) et celle de la zone de visualisation inférieure (106). La zone de visualisation inférieure (106) est destinée aux tâches de vision rapprochées de celui qui les porte.

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