公开(公告)号：US20250003731A1

公开(公告)日：2025-01-02

申请号：US18756400

申请日：2024-06-27

Applicant: Alcon Inc.

Inventor： Yeming Gu ,  Yan Wang ,  Seyedhadi Hosseini

IPC: G01B9/02091 ,  G01B11/24 ,  G02C7/02

Abstract: A method for quantitively evaluating contact lens edge lift and distortion. The method includes the steps of scanning an edge of a contact lens, modeling the edge profile, determining a best-fit line over the modeled edge profile, calculating the slope of the best-fit line at a contact lens edge point, and further calculating a slope edge angle (ESA) as a function of the slope, wherein the ESA is a highly effective metric for capturing the contact lens edge-lift relative to the intended shape of the lens. The method may be used to provide design feedback, predict clinical fitting outcomes, and for quality control purposes.