Rodenstock Gmbh

Martin Zimmerman

Gregor Esser

Helmut Altheimer

Andrea Welk

Walter Haimerl

Wolfgang Becken

Herbert Pfeiffer

Werner Mueller

Peter Baumbach

Jochen Brosig

Rainer Dorsch

Dietmar Uttenweiler

Edda Wehner

Anne Seidemann

Adam Muschielok

Winfried Nikolaus

Norbert Awrath

Martin Wechs

Stephan Haser

Werner Müller

Ilka Schwarz

Robert Bichler

Nadine Jung

Katrin Nicke

In a method for creating a design of a prescription surface of a multifocal lens, in particular for a progressive spectacle lens, at first data and second data for describing at least one aberration of an eye of a proband for a first situation of use and a second situation of use, respectively, are obtained, and then a first set of parameters and a second set of parameters of a predetermined prescription surface equation are determined from the first and second data, wherein the prescription surface equation is assigned to a first reference point of the prescription surface for the first set of parameters, and is assigned to a second reference point of the prescription surface for the second set of parameters.

Method for creating a design of a prescription surface of a multifocal lens and multifocal lens comprising such a prescription surface

The invention relates to a method for specifying or determining the spatial position of a distance reference point and/or a near reference point of a progressive spectacle lens for correcting defective vision of a spectacle wearer. Said method consists of the following steps: individual data of the spectacle wearer is obtained; the individual vertical and/or the horizontal position of the distance reference point and/or the near reference point is determined or calculated in accordance with the determined individual data of the spectacle wearer.

Method for determining far and near reference points

The invention relates to a method for producing a progressive spectacle lens and to a corresponding apparatus, a computer program product, a storage medium and to the use of a progressive spectacle lens. The invention also relates to a method for producing a progressive spectacle lens for correcting defective vision of a spectacle wearer, comprising the following steps: the vertical and/or the horizontal spatial position of a distance reference point and/or a near reference point is specified or determined in accordance with individual data of the spectacle wearer; the spectacle lens is optimized or calculated such that the required dioptric effect of the spectacle lens is obtained in the individually determined distance reference point and/or the near reference point.

Method for calculating a spectacle lens having a variable position of the reference points

A double-progressive spectacle lens in which the progressive action is distributed over the front and rear surfaces of the double-progressive spectacle lenses and described by the quotient Q=Add/Addwhere Addrepresents the increase in the surface dioptric power along the principal line on the front surface between the distance area and the near area, and ADDrepresents the increase in the total dioptric power along the principal line between the distance area and the near area, and the fraction Q increases with growing distance area effect F: 

Double progressive spectacle lens

A spectacle lens is provided with a region (distance portion) designed for viewing at greater distances and, in particular, 'to infinity', a region (near portion) designed for viewing at short distances and, in particular, 'reading distances', and a progression zone disposed between the distance portion and the near portion, in which the power of the spectacle lens increases from the value in the distance reference point located in the distance portion to the value at the near reference point located in the near portion along a line (principal meridian) curving towards the nose. The invention is marked by specific conditions for the astigmatic deviation and/or the mean &#x201c;as worn&#x201d; power being observed.

Progressive spectacle lens

A spectacle lens comprises a region (distance portion) designed for viewing at greater distances, in particular, to infinity; a region (near portion) designed for viewing at short distances and, in particular, &ldquo;reading distances&rdquo;; and a progression zone located between the distance portion and the near portion, in which the power of the spectacle lens increases from a value at the distance reference point located in the distance portion to the value at the near reference point located in the near portion along a line (principal meridian) curving towards the nose. It is one of the characteristics of the invention that for minimizing the change of imaging properties with horizontal movements of the gaze along a curve described by the points of penetration of the principal rays through the front surface, these principal rays passing through a point having the coordinates (x&minus;dx, y, s) at the beginning of the movement and a point having the coordinates (x &plus;dx, y, s) at the end of the movement, at s&equals;&minus;40 mm and dx&equals;10 mm particular conditions apply.

Progressive spectacle lens exhibiting only slight dynamic change of the properties of use during a horizontal viewing movements

Growing community of inventors

Erdweg-Kleinberghofen, Germany

Martin Zimmerman