Rodenstock Gmbh

Optische Werke G. Rodenstock

Stephan Haser

Helmut Altheimer

Gregor Esser

Andrea Welk

Walter Haimerl

Herbert Pfeiffer

Werner Mueller

Peter Baumbach

Jochen Brosig

Rainer Dorsch

Winfried Nikolaus

Norbert Awrath

Martin Wechs

Martin Zimmermann

Martin Zimmerman

A method of calculating an individual progressive lens creates one or more basic designs for lenses based on theoretical specifications, and then creates starting designs from these basic designs. Individual progressive lenses are calculated from the starting designs corresponding to the individual data from wearing test subjects. Valid starting designs are then created for production. The individual lenses are calculated from the starting designs according to individual customer data.

Method for calculating an individual progressive 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

Described is a spectacle lens comprising a region (distance portion) designed for viewing at large distances and in particular &ldquo;to infinity&rdquo;, a region (near portion) designed for viewing at short distances and in particular &ldquo;reading distances&rdquo;, and a progressive zone disposed between the distance portion and the near portion, in which the power of the spectacle lens increases from a value at a distance reference point located in the distance portion to a value at the near reference point located in the near portion along a curve (principal line) veering towards the nose. The invention is distinct in that the astigmatic deviation, i.e. the difference between the prescribed and the actual astigmatism along circles having a center lying 4 mm below the centration point and having a diameter of 10 to 40 mm satisfies the following conditions: two local minima occur which on a &ldquo;right-hand side spectacle lens&rdquo; are located at 95&deg;&plusmn;10&deg; (according to TABO) and at 280&deg;&plusmn;10&deg;, and on a &ldquo;left-hand side spectacle lens&rdquo; at 85&deg;&plusmn;10&deg; and 260&deg;&plusmn;10&deg;; and two local maxima occur which on both a &ldquo;right-hand side spectacle lens&rdquo; and also a &ldquo;left-hand-side spectacle lens&rdquo; are located at 215&deg;&plusmn;10&deg; and 335&deg;&plusmn;10&deg;.

Progressive spectacle lens with low swaying effects

Growing community of inventors

Munich, Germany

Stephan Haser