METHOD FOR DETERMINING AT LEAST ONE OPTICAL DESIGN PARAMETER FOR A PROGRESSIVE OPHTHALMIC LENS

A method for determining at least one optical design parameter for a progressive ophthalmic lens intended to be fitted in a frame of a wearer, depending on the wearer's visual behaviour, includes: a) placing the wearer in a situation in which he carries out a visual task at a first working dist...

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Bibliographische Detailangaben
Hauptverfasser:	HADDADI, Ahmed, DROBE, Bjorn, BARANTON, Konogan, WIERZBICKI, Juliette, MARIE, Sarah, BONNIN, Thierry
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CONTACT LENSES DIAGNOSIS HUMAN NECESSITIES HYGIENE IDENTIFICATION MEDICAL OR VETERINARY SCIENCE OPTICS PHYSICS SPECTACLES SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES SURGERY
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Beschreibung
Zusammenfassung:	A method for determining at least one optical design parameter for a progressive ophthalmic lens intended to be fitted in a frame of a wearer, depending on the wearer's visual behaviour, includes: a) placing the wearer in a situation in which he carries out a visual task at a first working distance; b) during this task, determining at least two gaze directions of the wearer at this first working distance in a frame of reference of the wearer's head; c) determining a relative position of a surface related to the frame or to an ophthalmic lens intended to be fitted in the frame; d) determining for each gaze direction at the first working distance the intersection between this gaze direction and the surface so as to establish a map of these points of intersection on this surface; and e) deducing the sought-after optical design parameter from this map.