Patent application number | Description | Published |
20100283967 | Method of Calculating an Optical System According to a Given Spectacle Frame - A method of calculating an optical system (OS) of an ophthalmic lens according to a given spectacle frame comprising the steps of: providing geometrical data of the spectacle frame, providing wearer data, and optimization of the optical system (OS) according to at least the criteria consisting of the geometrical data of the spectacle frame, the wearer data and at least one positioning data, so as to generate at least two optical surfaces (S | 11-11-2010 |
20110184830 | Method for Determining the Inset of a Progressive Addition Lens - A method for determining the value of the inset of a progressive addition lens according to a wearer comprising the steps of: providing convergence data, determining from the convergence data the inset of the progressive addition lens considering at least the convergence data and the prismatic effect of the progressive addition lens. | 07-28-2011 |
20110273664 | METHOD FOR DETERMINING AN ASPHERIZATION LAYER FOR AN OPHTHALMIC LENS - The invention relates to a method for determining an aspherization layer for an ophthalmic lens for a wearer for whom a power and an astigmatism have been prescribed. The method can be used equally satisfactorily on a unifocal or a multifocal lens. The invention also extends to the method for determining an ophthalmic lens from an aspoherization layer obtained by the method. The invention improves the optical performance of lenses obtained from semi-finished lenses in which the complex surface is unknown. | 11-10-2011 |
20110317128 | SPECTACLE EYEGLASS FOR MYOPIC CHILD - A spectacle eyeglass of progressive addition type has been designed for myopic children. To this purpose, an ergorama has been constructed, taking into account vision conditions encountered by the children in their everyday life. In particular, the eyeglass has a limited optical power increase between two reference eye directions (D | 12-29-2011 |
20120105800 | Method And Apparatus For Designing An Optical Lens - A method and an apparatus for designing an optical lens surface for the manufacture of the optical lens, the method comprising the steps of providing a reference surface S | 05-03-2012 |
20120176583 | Single Vision Ophthalmic Lens - An ophthalmic lens ( | 07-12-2012 |
20120212705 | OPTICAL FUNCTION DETERMINING METHOD - A method implemented by computer means for determining a virtual wearer-ophthalmic lens-ergorama system associated with an optical function of an ophthalmic lens for a given wearer, comprising: a prescription data providing step, an optical reference surface data providing step, a virtual wearer-ophthalmic lens-ergorama system determining step, a criteria selecting step, a target value defining step, an evaluation step, and a modification step, in which at least one parameter of the virtual wearer-ophthalmic lens-ergorama system different from the base curve of the ophthalmic lens is modified, in order to minimize the difference between the target value and the evaluation criterion value. | 08-23-2012 |
20120268713 | METHOD FOR DETERMINING, OPTIMISING AND PRODUCING AN OPHTHALMIC LENS AND SET OF OPHTHALMIC LENSES - The invention relates to a method for determining an ophthalmic lens for a person (i | 10-25-2012 |
20120300172 | Process for Designing an Ophthalmic Progressive Eyeglass - A process for designing an ophthalmic progressive eyeglass comprises providing an initial front surface and an initial back surface. Respective addition values of front and back surfaces of the eyeglass are varied based on said initial front and back surfaces using a surface derivation tool. These surface addition values are selected so that the eyeglass exhibits an eyeglass addition value which matches a wearer's prescription and a value for a design feature which matches a target value. Said target value may be used for customizing the ophthalmic progressive eyeglass. The process does not require point-to-point surface optimization. | 11-29-2012 |
20130038833 | PROGRESSIVE MULTIFOCAL OPHTHALMIC LENS - The invention relates to a finished or semi-finished lens which comprises: a disc containing all the points of the lens that have the same abscissa and the same ordinate as points located within a circle in the reference plane having a diameter of 30 millimetres and centred on the prism reference point; a progression length of less than 14.5 millimetres; a first specific point having a cylinder value equal to the maximum cylinder value of all the points of the lens located in the nasal area and in the disc; and a second specific point having a cylinder value equal to the maximum cylinder value of all the points of the lens located in the temporal area and in the disc; a first ratio between: the maximum gradient of the cylinder for the points of the lens that have the same abscissa and the same ordinate as the points located on segments connecting the mounting cross to the first and second specific points, and surface addition of less than 0.095 per millimetre; and a second ratio between: the maximum cylinder value of the first and second specific points, and surface addition of no more than 0.85. The invention enhances the comfort of the wearer. | 02-14-2013 |
20130148078 | PROGRESSIVE MULTIFOCAL OPHTHALMIC LENS - The invention relates to a lens having certain properties, including: a circle grouping together all the points of the lens having the same abscissa and the same ordinate as points located on a circle in the reference plane, having a diameter of 35 millimetres and centred on a point located 8.5 millimetres below the mounting cross and horizontally offset on the nasal side by 1.25 millimetres; a disc grouping together all the points of the lens having the same abscissa and the same ordinate as points located inside said circle; a progression length of less than 14.5 millimetres; a ratio difference between the value of the cylinder and the surface addition of less than 0.2 as an absolute value for every pair of points of the lens that are symmetrical relative to the mounting cross and have the same ordinate as the mounting cross, and an abscissa with an absolute value of less than 20 millimetres; a first ratio between: the maximum cylinder value for all the points of the circle; and the surface addition of less than 0.7; and a second ratio between: the maximum cylinder value for all the points of the disc; and the surface addition of no more than 1.05. The invention is suitable for improving the comfort of the wearer. | 06-13-2013 |