Method for Determining an Ophthalmic Lens
AssigneeEssilor International
InventorsPascal Allione, Diane De Gaudemaris
Life of this patent
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Abstract
The invention relates to a method for the optimisation determination of an ophthalmic lens that comprises the steps of: measuring parameters representative of the eye-head behaviour of the wearer; determining a central area on the lens having a diameter (Dc) that depends on the measured parameters representative of the eye-head behaviour; determining a peripheral area on the lens; optimising the lens when worn by the wearer by applying power and astigmatism target values in the central area and target values of a parameter different from the wearer's power in the peripheral area for given watching directions. The invention reduces the thickness of the lens and optimises the wearer's peripheral vision.
Claims12
1-6. (canceled)
Method for determining an ophthalmic lens customized for a given wearer, comprising:
- measuring parameters representing the wearer's head-eye behaviour;
- determining a central zone on the lens whose diameter (Dc) depends on the parameters representative of the measured eye-head behaviour;
- determining a peripheral zone on the lens;
- and
- optimizing the lens under the conditions when being worn by applying target power and astigmatism values in the central zone and target values of a parameter other than the power of the wearer in the peripheral zone for given viewing directions.
An ophthalmic lens customized for a given wearer, said lens having a central zone whose diameter is determined as a function of parameters representative of the eye-head behaviour measured on the wearer.
Dependencies are inferred from the claim text.