Progressive addition lenses

• US 6,709,105 B2
• Filed: 04/10/2001
• Issued: 03/23/2004
• Est. Priority Date: 04/10/2001
• Status: Expired due to Term

• Current Assignee: Essilor International SA
• Original Assignee: Johnson & Johnson Vision Care Incorporated (Johnson & Johnson)
• Inventors: Menezes, Edgar V.
• Primary Examiner(s): SCHWARTZ, JORDAN MARC
• Application Number:
  US09/832,236
• Publication Number:
  US 20020196410A1
• Time in Patent Office: 1,078 Days
• Field of Search: 351/169, 351/168, 351/170-172
• US Class Current: 351/169
• CPC Class Codes: G02C 7/061 Spectacle lenses with progressively varying focal power
• CPC Class Codes: G02C 7/063 Shape of the progressive surface

Abstract

The present provides progressive addition lens designs and lenses in which unwanted lens astigmatism is reduced as compared to conventional progressive addition lenses. The lenses of the invention containing at least one surface that is a composite of a progressive surface design and a regressive surface design.

Claims

1. A progressive addition lens, comprising a normalized lens distortion of less than about 300 mm² and comprising a front surface and back surface of the lens wherein at least one of the front and back surfaces.

2. The lens of claim 1, wherein the composite surface exhibits a maximum, localized unwanted astigmatism that is about 0.125 diopters less than the sum of an absolute value of the maximum, localized astigmatism of each of the progressive and regressive surfaces.

3. The lens of claim 1 or 2, further comprising a second progressive addition surface.

4. The lens of claim 1 or 2, further comprising a second surface that is a regressive surface.