IOL with varying correction of chromatic aberration

US8709079B2 · kind B2 · utility

Assignee

• Novartis AG · CH

Inventors

• Xiaoxiao Zhang · Fort Worth, US
• Costin Eugene Curatu · Crowley, US
• Krishnakumar Venkateswaran · Aliso Viejo, US
• Daniel Robert Carson · Fort Worth, US
• Mutlu Karakelle · Fort Worth, US
• Xin Hong · Arlington, US
• Yueai Liu · Fort Worth, US

Key dates

• Filing date: May 14, 2010
• Grant date: Apr 29, 2014
• Expiry date: Jun 24, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C2202/22
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An ophthalmic lens includes an optical filter operable to filter out at least visible light having a wavelength less than 450 nm. The lens also includes a first diffractive structure adapted to produce a focus for visible light in a first wavelength range above 550 nm and to reduce longitudinal chromatic aberration to less than one diopter for incoming visible light in the first wavelength range. The lens also includes a second diffractive structure outside the first diffractive structure in a radial direction and adapted to produce a focus for visible light in a second wavelength range between 450 nm and 550 nm. The second diffractive structure is also adapted to reduce longitudinal chromatic aberration for incoming visible light in the second wavelength range to less than one diopter while allowing longitudinal chromatic aberration in the first wavelength range in an amount greater than the first diffractive structure.