G - Physics – 02 – C
Patent
G - Physics
02
C
G02C 7/02 (2006.01)
Patent
CA 2587479
The invention relates to the determination of a pair of ophthalmic lenses, by measurement of the sagittal plane shift of the wearer for close vision with relation to the standard sagittal plane. Optimisation targets are then chosen as a function of the measured shift. The lenses are determined by optimisation with the chosen targets. Lenses are thus obtained with which the field of close vision is symmetrical with relation to the medial line as perceived by the wearer. A wearer with a displaced sagittal plane thus has a greater close vision field which facilitates binocular vision and increases acuity.
Pour déterminer une paire de lentilles ophtalmiques, on mesure le décalage du plan sagittal du porteur en vision de près, par rapport au plan sagittal standard. On choisit ensuite des cibles d'optimisation, en fonction du décalage mesuré. Les lentilles sont déterminées par optimisation, à partir des cibles choisies. On obtient ainsi des lentilles dans lesquelles le champ de vision de près est bien symétrique par rapport à la ligne médiane perçue par le porteur. Un porteur ayant un plan sagittal décalé dispose donc d'un champ de vision de près plus large, ce qui favorise la vision binoculaire et augmente l'acuité.
Essilor International (compagnie Generale D'optique)
Gowling Lafleur Henderson Llp
LandOfFree
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