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相关概念视频

Focusing of Light in the Eye01:16

Focusing of Light in the Eye

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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...
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相关实验视频

Updated: Jun 8, 2025

Subjective Refraction Test Using a Smartphone for Vision Screening
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主观折射测试使用智能手机进行视力查.

Gang Luo1, Chen-Yuan Lee2, Zheng Wang3

  • 1Schepens Eye Research Institute, Mass Eye & Ear; Department of Ophthalmology, Harvard Medical School; gang.luo@schepens.harvard.edu.

Journal of visualized experiments : JoVE
|November 4, 2024
PubMed
概括
此摘要是机器生成的。

一个新的智能手机应用程序使非专业人员能够在没有附件的情况下测量折射误差和纹. 这种视力查工具的准确性与临床方法相提并论,改善了人们获得眼科护理的机会.

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Last Updated: Jun 8, 2025

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科学领域:

  • 眼科医生 眼科 眼科
  • 医疗技术 医疗技术 医学技术
  • 公共卫生 公共卫生

背景情况:

  • 获得视力护理的机会有限,特别是在服务不足的社区.
  • 群体视力查对于早期检测折射误差至关重要.
  • 智能手机技术为可访问和负担得起的视力诊断提供了潜力.

研究的目的:

  • 描述一款新型智能手机应用程序的测量协议,使主观折射成为可能.
  • 评估应用程序测量折射误差和的有效性.
  • 评估应用程序在测量瞳孔间距离 (IPD) 的准确性.

主要方法:

  • 一个独立的智能手机应用程序被开发来测量使用视觉刺激的折射误差.
  • 建立了主观折射,球体等效,纹和IPD测量的协议.
  • 在34名受试者中,APP测量与标准临床方法进行了比较.

主要成果:

  • 该应用程序显示了球体等效折射的平均绝对误差为0.63D.
  • 测量风的平均绝对误差为0.28D.
  • 皮膜间距离 (IPD) 测量的平均绝对误差为1.2mm.

结论:

  • 智能手机应用程序提供了一种有效且易于使用的方法来测量折射误差和纹.
  • 该应用程序可以被普通人员用于大规模视力查,改善对眼睛护理的准入.
  • 开发的协议使用智能手机技术促进了准确的视力评估.