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System and Method for Obtaining Ophthalmic Measurements for Progressive Lenses that Accurately Account for Body Stature and Posture

  • US 20190324290A1
  • Filed: 04/17/2019
  • Published: 10/24/2019
  • Est. Priority Date: 04/20/2018
  • Status: Active Grant
First Claim
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1. A method of obtaining some ophthalmic measurements needed to fabricate a progressive lens for a person, wherein said progressive lens has different curvatures for a far region, an intermediate region and a near region, said method comprising the steps of:

  • selecting a set of eyeglass frames that has a lens plane;

    having the person wear said eyeglass frames;

    determining a primary line of sight for said person wearing said eyeglass frames, wherein said primary line of sight intersects said lens plane at a first intersection point;

    preforming control simulations where said person wearing said eyeglass frames views at least one object at different distances to determine an average far gaze view line, an average intermediate gaze view line, and an average near gaze view line, wherein said average far gaze view line intersects said lens plane at a second intersection point, said average intermediate gaze view line intersects said lens plane at a third intersection point, and said average near gaze view line intersects said lens plane at a fourth intersection point,determining a first range on said progressive lens to position said far region, wherein said first range extends from a first position above said first intersection point to a second position below said second intersection point;

    determining a second range on said progressive lens to position said intermediate region, wherein said second range extends from said second position to a third position below said third intersection point; and

    determining a third range on said progressive lens to position said near region, wherein said third range extends from said third position to a fourth position below said fourth intersection point.

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