使用临床光学连贯断层扫描来描述隐形镜片边缘形状和基本曲线半径
Sofia Otin Mallada1, Diana Gargallo Yebra1, Nerea Tolón Zardoya1
1Applied Physics, University of Zaragoza, Zaragoza, Spain.
Clinical & experimental optometry
|January 15, 2024
概括
这项研究表明,临床光学连贯断层扫描仪器可以准确地测量刚性气体透性隐形眼镜的几何形状. 使用自定义适配器的3D OCT-1000,可靠地在制造公差范围内测量后光区半径.
科学领域:
- 眼科设备的特征描述
- 隐形眼镜的计量学 隐形眼镜的计量学
- 光学成像技术的使用.
背景情况:
- 临床光学连贯断层扫描 (OCT) 设备在光学和眼科中至关重要.
- 准确的隐形镜头几何形状,包括底部曲率半径和边缘形状,对于正确的安装至关重要.
- OCT提供了一种强大的方法,用于精确测量隐形眼镜的几何形状.
研究的目的:
- 评估临床光学相干断层扫描 (OCT) 装置 (3D OCT-1000) 的性能,用于描述隐形眼镜边缘形状.
- 评估使用OCT在体外测量硬气透性隐形眼镜后光区半径的准确性和可重复性.
主要方法:
- 一个定制的光机械OCT隐形眼镜适配器被设计和3D打印.
- 开发了图像处理算法和校准方法,以测量OCT B扫描的后光区半径.
- 评估了系统的性能,以区分隐形镜片边缘几何形状和测量后光区半径.
主要成果:
- 带有适配器的3D OCT-1000成功获得了能够区分软和刚性隐形镜片边缘几何形状的图像.
- 统计分析证实了对刚性隐形眼镜的后光区域半径测量具有令人满意的准确性和可重复性.
结论:
- 一个3D OCT-1000,加上一个定制的适配器和图像处理,可以有效地评估接触镜片边缘在体外.
- 这种带有线性校准的OCT系统,可以在ISO 18,369-2:2018制造公差 (±0.05毫米) 范围内测量硬气透性隐形眼镜的后光区域半径.
相关概念视频
01:13Contact Angle
12.4K
When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
12.4K
01:16Focusing of Light in the Eye
2.8K
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
2.8K