AN OPHTHALMIC LENS FOR IMPROVING NIGHT DRIVING VISION AND A METHOD FOR OBTAINING THE SAME

This ophthalmic lens has a front face and a rear face, and has: a light cut factor CutLED of at least 20% for wavelengths ranging from 380 nm to 500 nm, CutLED being defined by:CutLED=100−∑λ=380500lens T%×LED emission%∑λ=380500LED emission%where Σ is a discrete or continuous sum operator, λ is the w...

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Bibliographische Detailangaben
Hauptverfasser:	MONTECELO, Susana, LECHAT, Céline, ROBIN, Céline, DUBAIL, Marie
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CONTACT LENSES OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PERFORMING OPERATIONS PHYSICS PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE SPECTACLES SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	This ophthalmic lens has a front face and a rear face, and has: a light cut factor CutLED of at least 20% for wavelengths ranging from 380 nm to 500 nm, CutLED being defined by:CutLED=100−∑λ=380500lens T%×LED emission%∑λ=380500LED emission%where Σ is a discrete or continuous sum operator, λ is the wavelength in nm, lens T% is the transmittance of said lens in % and LED emission% is the spectral distribution of a white light emitting diode in %; and an antireflective coating on the front and rear faces having a luminous reflectance in the visible region for scotopic vision Rv' lower than or equal to 1.5%.