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Nonprogressive multi-focal ophthalmic lens

  • US 5,953,099 A
  • Filed: 10/22/1997
  • Issued: 09/14/1999
  • Est. Priority Date: 10/22/1997
  • Status: Expired due to Fees
First Claim
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1. A non-progressive, multi-focal ophthalmic lens for simultaneously providing enhanced distance vision and near-viewing vision without obstruction from a dividing line as a patient moves its eyes between a distance viewing line of sight and a near viewing line of sight, said lens comprising:

  • a first arcuate transparent area for distance viewing having a first radius of curvature;

    a second arcuate transparent area for near viewing having a second radius of curvature, said second area radius of curvature being shorter than said first area radius of curvature, said first area surrounding said second area, said second area having a top edge joining said second area and said first area, said second area being oriented in substantial alignment with the near viewing line of sight; and

    a non-obstructive, invisible transition corridor defined by a tangential component common to said first area and said second area,said first area and said second area sharing a common arc at a co-existing tangent, the optical center for the near viewing lens being located at the top of the near viewing lens area, said transition corridor preventing image jump, loss of image, and viewing distortion.

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