Erickson P, Robboy M, Apollonio A, Jones W F
Bausch & Lomb, Inc., Rochester, NY 14692.
J Am Optom Assoc. 1988 Mar;59(3):198-202.
Primary concerns for designing conventional bifocal contact lens optics involve placement of sufficient representation of distance and near optical powers before the pupil and minimizing the presence of secondary images. Geometrical models and lens measurements are used to establish guidelines for predicting bifocal contact lens performance. Proportional optical zone representation, image jump, and power distribution are presented for the most commonly employed bifocal zone configurations. Adequate zone representation and effective lens power are shown to be quite sensitive to variation in pupil size and position. Strategies for optimizing lens performance in view of these effects are discussed.
设计传统双焦点隐形眼镜光学系统的主要关注点包括在瞳孔前方放置足够的远用和近用光学度数，并尽量减少二次像的出现。几何模型和镜片测量用于建立预测双焦点隐形眼镜性能的指导原则。针对最常用的双焦点区域配置，给出了比例光学区表示、像跳和屈光力分布。结果表明，足够的区域表示和有效镜片屈光力对瞳孔大小和位置的变化相当敏感。讨论了鉴于这些影响优化镜片性能的策略。
