• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Conference on ophthalmic technologies XIX; 20090124-26; San Jose, CA(US) >Working sketch of an anatomically and optically equivalent physical model eye
【24h】

Working sketch of an anatomically and optically equivalent physical model eye

机译：解剖上和光学上等效的物理模型眼睛的工作草图

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Our aim was to fabricate a bench-top physical model eye that closely replicates anatomical and optical properties of the average human eye, and to calibrate and standardize this model to suit normal viewing conditions and subsequently utilize it to understand the optical performance of corrective lens designs; especially multifocal soft contact lenses. Using available normative data on ocular biometrics and Zemax ray-tracing software as a tool, we modeled 25, 45 and 55 year-old average adult human eyes with discrete accommodation levels and pupil sizes. Specifications for the components were established following manufacturing tolerance analyses. The cornea was lathed from an optical material with refractive index of 1.376 @ 589 nm and the crystalline lenses were made of Boston RGP polymers with refractive indices of 1.423 (45 & 55yr) and 1.429 (25yr) @ 589 nm. These two materials served to model the equivalent crystalline lens of the different age-groups. A camera, the acting retina, was hosted on the motor-base having translatory and rotary functions to facilitate the simulation of different states of ametropia and peripheral refraction respectively. We report on the implementation of the first prototype and present some simulations of the optical performance of certain contact lenses with specific levels of ametropia, to demonstrate the potential use of such a physical model eye. On completion of development, calibration and standardization, optical quality assessment and performance predictions of different ophthalmic lenses can be studied in great detail. Optical performance with corrective lenses may be reliably simulated and predicted by customized combined computational and physical models giving insight into the merits and pitfalls of their designs
机译：我们的目标是制造一种台式物理模型眼睛，该模型可以紧密复制普通人眼的解剖和光学特性，并校准和标准化该模型以适合正常的观看条件，随后利用它来了解矫正镜片设计的光学性能;特别是多焦点软性隐形眼镜。我们使用眼部生物识别技术和Zemax光线追踪软件上的可用规范数据作为工具，对25岁，45岁和55岁的成年人平均眼睛进行了建模，其中分别具有不同的适应水平和瞳孔大小。在制造公差分析之后，建立了组件的规格。角膜由折射率为1.376 @ 589 nm的光学材料加工而成，而晶状体由折射率为1.423（45＆55yr）和1.429（25yr）@ 589 nm的Boston RGP聚合物制成。这两种材料可用来模拟不同年龄组的等效晶状体。在运动基座上装有一个摄像机，即活动视网膜，具有平移和旋转功能，分别有助于模拟屈光不正和周围屈光状态。我们报告了第一个原型的实施情况，并提出了某些具有特定屈光不正水平的隐形眼镜的光学性能模拟，以证明这种物理模型眼睛的潜在用途。完成开发，校准和标准化后，可以详细研究不同眼镜片的光学质量评估和性能预测。校正镜片的光学性能可以通过定制的组合计算模型和物理模型可靠地模拟和预测，从而洞察其设计的优缺点

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号