Progressive addition lens for myopia control and method of manufacturing the same

US11782293B2 · kind B2 · utility

Assignee

• Carl Zeiss Vision International GmbH · DE

Inventors

• Saulius Raymond Varnas · Brighton, AU
• Ray Steven Spratt · Petaluma, US
• Timo Kratzer · Aalen, DE
• Gerhard Kelch · Aalen, DE
• Siegfried Wahl · Donzdorf, DE

Key dates

• Filing date: Jan 25, 2023
• Grant date: Oct 10, 2023
• Expiry date: Jan 25, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C2202/24
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A progressive addition lens contains a plurality of microlenses for providing simultaneous myopic defocus. The microlenses are superimposed on a power variation surface of the lens, which includes a designated distance portion in the upper section of the lens adapted for distance vision and a fitting cross; a designated near portion located in the lower section of the lens, the near portion including a near reference point having a near dioptric power adapted for near vision; and a designated intermediate corridor extending between the designated distance portion and near portions. Microlenses are excluded from all areas of the surface located below a notional line extending from nasal to temporal limits of the lens at a vertical coordinate above the near reference point where the vertical coordinate lies at a distance above the near reference point with the distance being in a range between 1.5 mm and 3 mm.