Method for selecting base-curves for an ophthalmic lens and...

G - Physics – 02 – C

Patent

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G02C 7/02 (2006.01)

Patent

CA 2710592

A method for selecting base-curves for an ophthalmic lens according to given prescription data comprising the steps of : - providing a base-curve series consisting of a plurality of base-curves; - calculating a target lens according to the prescription data; - calculating the base-curves calculated lenses according to the prescription data; - selecting, for at least an optical parameter and/or a geometrical parameter, a threshold value for the difference between the base-curves calculated lenses values and the target lens value of said parameter (s}; -- determining the list of the base-curves of the base-curve series where said difference for said parameter (s) is less or equal to the selected threshold value (s).

L'invention concerne un procédé permettant de sélectionner des courbures de base d'un verre ophtalmique selon des données de prescription, qui consiste: à fournir des séries de courbures de base constituées d'une pluralité de courbures de base; à calculer un verre cible selon les données de prescription; à calculer les verres calculés des courbures de base selon les données de prescription; à sélectionner, du moins pour un paramètre optique et/ou un paramètre géométrique, une valeur seuil pour la différence entre les valeurs des verres calculés des courbures de base et la valeur du verre cible dudit paramètre (s); à déterminer la liste des courbures de base des séries des courbures de base où ladite différence pour ledit paramètre (s) est inférieure ou égale à la valeur seuil sélectionnée (s).

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