Presbyopia correction program
    9.
    发明公开
    Presbyopia correction program 有权
    Programme zur Korrektur von Presbyopie

    公开(公告)号:EP1754460A1

    公开(公告)日:2007-02-21

    申请号:EP05018062.9

    申请日:2005-08-19

    IPC分类号: A61F9/01 G02C7/04 G02C7/06

    摘要: A method of generating a computer program for control of an apparatus for photorefractive treatment of presbyopia by ablation of corneal tissue or a contact lens, comprising the following steps:
    (a) electing an eye model,
    (b) measuring the pupil diameter of the patient at far distance mesopically and at short distance photopically,
    (c) selecting wanted short and far distances regarding optimum sight,
    (d) calculating a global optimum regarding curvature (1/R) and asphericity (Q) of the cornea on the basis of the results obtained in steps (a) (b) and (c) by means of optical ray tracing and minimal spot diameter at the retina, and
    (e) deriving the computer program in accordance with the results of step (d).
    Alternatively step (d) includes determining a central steep island with a diameter in the range of 2 to 4 millimeters at the cornea and calculating a curvature and asphericity in the rest of the cornea.

    摘要翻译: 一种生成计算机程序的方法,用于通过角膜组织或隐形眼镜的消融来控制用于光老化眼屈光治疗的装置,包括以下步骤:(a)选择眼模型,(b)测量患者的瞳孔直径 (c)选择有关最佳视力的短距离和远距离,(d)根据角度计算角膜的曲率(1 / R)和非球面度(Q)的全局最优值 在步骤(a)(b)和(c)中通过光线跟踪和视网膜处的最小斑点直径获得的结果,以及(e)根据步骤(d)的结果导出计算机程序。 或者,步骤(d)包括在角膜处确定直径在2至4毫米范围内的中心陡峭的岛,并计算其余角膜的曲率和非球面度。