PROGRESSIVE ADDITION LENS FOR MYOPIA CONTROL AND METHOD OF MANUFACTURING THE SAME

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 fittin...

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Bibliographische Detailangaben
Hauptverfasser: Kratzer, Timo, Wahl, Siegfried, Varnas, Saulius Raymond, Kelch, Gerhard, Spratt, Ray Steven
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung: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.