Ophthalmic lens

Ophthalmic lens

The lens has an aspherical surface with a geometrical center, a reference point for near vision, and a virtually umbilical and vertical meridian line with a mean spherical and cylindrical value at each point. The area formed by points at a distance of less than 20 mm from the geometrical center and...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: ERIC ROLAND, CLAUDE PEDRONO, FANNY JURKIEWIEZ, CATHERINE FAUQUIER, CHRISTIAN HARSIGNY
Format: Patent
Sprache:eng
Schlagworte:
CONTACT LENSES
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
SPECTACLES
SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES
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Beschreibung
Zusammenfassung:The lens has an aspherical surface with a geometrical center, a reference point for near vision, and a virtually umbilical and vertical meridian line with a mean spherical and cylindrical value at each point. The area formed by points at a distance of less than 20 mm from the geometrical center and with a cylindrical value of between 0.42 and 0.84 diopter is greater than the area formed by points at a distance of less than 20 mm from the geometrical center and with a cylindrical value of less than 0.42 diopter.