PROGRESSIVE SPECTACLE LENS WITH TWO NON-SPHERICAL PROGRESSIVE SURFACES

The two non-spherical and especially progressive surfaces increase in effectiveness from long-distance to short distance part. The peripheral areas of one or both surfaces have mainly free shapes. The pre-set values of the heights of the surface(s) on the edge are mainly set by means of geometric da...

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Bibliographische Detailangaben
Hauptverfasser:	ESSER, GREGOR, ALTHEIMER, HELMUT, PFEIFFER, HERBERT, HAIMERL, WALTER
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CONTACT LENSES OPTICS PHYSICS SPECTACLES SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES
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Beschreibung
Zusammenfassung:	The two non-spherical and especially progressive surfaces increase in effectiveness from long-distance to short distance part. The peripheral areas of one or both surfaces have mainly free shapes. The pre-set values of the heights of the surface(s) on the edge are mainly set by means of geometric data,