Shaped non-corrective eyewear lenses and methods for providing same

US7134752B2 · kind B2 · utility

Assignee

• Sola International Holdings Ltd. · AU

Inventors

• Colin Maurice Perrott · Port Ludlow, US
• Kym Ansley Stockman · Happy Valley, AU
• Anthony Miller · Adelaide, AU

Key dates

• Filing date: Jun 23, 2004
• Grant date: Nov 14, 2006
• Expiry date: Jun 23, 2024

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C7/02
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The disclosure relates to shaped ophthalmic lenses and methods for providing such lenses, including non-powered lenses having non-quadratic surfaces of complementary curvature. Such lenses may have a curvature maximum away from an axis of symmetry and a substantially constant wall thickness. Equations describing and methods of designing such lenses are disclosed including embodiments where two spheres of substantially different curvature are merged in accordance with a weighting function, and adjusted using merit functions.