摘要:
A method for producing an ophthalmic spectacle lens makes it possible to fit out a wearer of lenses in a manner which is customized as a function of a perception of blur by said wearer. The lens is selected so that the wearer has the impression of having a field of sharp vision which has a reference width. This reference width is determined on the basis of a first lens which complies with the wearer's ophthalmic prescription and a reference threshold value of the blur. It is thereafter associated within the lens which is provided for the wearer with a threshold value of the blur which is perceived by this wearer.
摘要:
The invention relates to the making of a progressive spectacle lens for customizing the lens based on the blur perception by a future lens wearer. Accordingly, a blur threshold value is determined for the wearer according to a blur perception criterion that varies based on an optical-power addition value prescribed for the wearer. The blur threshold value is associated with a reference sight direction for the lens provided to the wearer.
摘要:
A method for producing an ophthalmic spectacle lens makes it possible to fit out a wearer of lenses in a manner which is customized as a function of a perception of blur by said wearer. The lens (V4) is selected so that the wearer has the impression of having a field of sharp vision which has a reference width. This reference width is determined on the basis of a first lens (V7) which complies with the wearer's ophthalmic prescription and a reference threshold value of the blur (BR). It is thereafter associated within the lens which is provided for the wearer with a threshold value (B0) of the blur which is perceived by this wearer.
摘要:
A method for measuring the perception of spatial orientation of a person comprising the steps of: modifying a first non visual frame of reference and providing a second non visual frame of reference and measuring the value of the parameter representative of the perception of spatial orientation; modifying a first visual frame of reference so as to provide a second visual frame of reference and measuring the value of the parameter representative of the perception of spatial orientation; combining the measured values of the parameters representative of the perception of spatial orientation of preceding steps so as to obtain a value representing the sensitivity of the person referred to a scale of sensitivity to perception of spatial orientation.
摘要:
The invention relates to an ophtalmic lens comprising, on its surface, a first central zone preferentially transmitting the long wavelengths of the visible spectrum, and a second peripheral zone preferentially transmitting the short wavelengths of the visible spectrum.
摘要:
A transparent and polarizing vision element (2) divided into several areas. At least two of said areas are associated with a luminous polarization filter. The light flowing through the element is allocated differently for two the areas according to a direction of notarization of the light. At least one polarization filter is oriented vertically, and at least one polarization filter is oriented horizontally in relation to the usual position of the element.
摘要:
The invention concerns a transparent and polarizing viewing element (2) divided into several zones (2a, 2b). At least one of the zones (2a) is associated with a light polarizing filter. The light passing through the optical surface is affected differently for two of said zones (2a, 2b) depending on the polarizing direction of said light. The polarizing filter is obliquely oriented relative to a horizontal direction (H) in the operational position of the element (2; 5), with an angle between the filter orientation and said horizontal direction of 90 degrees and of 0 degree.