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Design Philosophy For Progressive Addition Lenses

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Abstract

Although the basic ideas for the realization of progressive addition lenses (PALs) go back a lot further, the first patents which contain the essential characteristics of those PALs which have been successful on the market date back to the years 1953 (FR 658760 by Maitenaz) and 1954 (US 287 8721 by Kanolt).

© 1991 Optical Society of America

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