Ophthalmic progressive addition lens for a farsighted and presbyopic wearer; method for providing such a lens

An ophthalmic progressive addition lens for a farsighted and presbyopic wearer having a mean refractive power, PPO(α, β), a module of resulting astigmatism, ASR(α, β), an acuity loss value ACU(α, β), wherein the (α, β) functions are determined in as-worn conditions of the lens by the wearer, and a f...

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Bibliographische Detailangaben
Hauptverfasser:	Fricker, Sebastien, Rousseau, Benjamin, Heslouis, Melanie
Format:	Patent
Sprache:	eng
Schlagworte:	CONTACT LENSES OPTICS PHYSICS SPECTACLES SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES
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Beschreibung
Zusammenfassung:	An ophthalmic progressive addition lens for a farsighted and presbyopic wearer having a mean refractive power, PPO(α, β), a module of resulting astigmatism, ASR(α, β), an acuity loss value ACU(α, β), wherein the (α, β) functions are determined in as-worn conditions of the lens by the wearer, and a first acuity criterion, AcuityCriterion1 which fulfils following requirement: AcuityCriterion1≥44 D2.deg, and wherein: AcuityCriterion1 is defined as a combination of PPO(α, β), ASR(α, β), ADDp, and ACU(α, β).