Ophthalmic lens with optical sectors

G - Physics – 02 – C

Patent

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Details

G02C 7/04 (2006.01) A61F 2/16 (2006.01) G02C 7/06 (2006.01)

Patent

CA 2752794

The invention relates to an ophthalmic lens comprising a main lens part, a recessed part, an optical centre, and an optical axis through said optical centre, said main lens part having at least one boundary with said recessed part, said main lens part having an optical power of between about -20 to about +35 dioptre, said recessed part positioned at a distance of less than 2 mm from said optical centre and comprising a near part having a relative dioptre of about +1.0 to about +5.0 with respect to the optical power of said main lens part, said boundary or boundaries of said recessed lens part with said main lens part form a blending part or blending parts, are shaped to refract light away from said optical axis, and have a curvature resulting in a loss of light, within a circle with a diameter of 4 mm around said optical centre, of less than about 15%.

L'invention concerne une lentille ophtalmique comportant une partie de lentille principale, une partie en creux, un centre optique et un axe optique passant par ledit centre optique, ladite partie de lentille principale possédant au moins une frontière commune avec ladite partie en creux, ladite partie de lentille principale présentant une puissance optique comprise entre environ -20 et environ +35 dioptries, ladite partie en creux étant positionnée à une distance de moins de 2 mm dudit centre optique et comportant une partie de proximité présentant une dioptrie relative d'environ +1,0 à environ +5,0 par rapport à la puissance optique de ladite partie de lentille principale, ladite ou lesdites frontières de ladite partie de lentille en creux avec ladite partie de lentille principale formant une ou plusieurs parties de transition, présentant une forme apte à réfracter la lumière à l'écart dudit axe optique et présentant une courbure qui se traduit par une perte de lumière inférieure à environ 15%, à l'intérieur d'un cercle d'un diamètre de 4 mm autour dudit centre optique.

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