Subjective Refraction Test Using a Smartphone for Vision Screening.

IF 1.2 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Jove-Journal of Visualized Experiments Pub Date : 2024-10-18 DOI:10.3791/67506
Gang Luo, Chen-Yuan Lee, Zheng Wang, Preana Shivshanker, Yan Jiang, Shrinivas Pundlik
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Abstract

To improve access to vision care and to enable mass vision screening, a smartphone app has been developed to measure refractive errors. Without needing any external attachment, the app running on a standalone phone can be used by lay personnel to measure subjective refraction. Its validity has been pilot-tested in clinical settings and underserved communities. The app estimates the refractive error by measuring the distances of far points for discerning visual stimuli. Spherical equivalent refraction and astigmatism can be measured using Tumbling E letters and grating patterns, respectively. The purpose of this paper is to describe the measurement protocols for performing subjective refraction using the app. Experimental results with 34 subjects (30 eyes for spherical equivalent and 38 eyes for astigmatism assessment) are presented. Measurement with the app was compared with standard clinical methods. The average absolute error of spherical equivalent refraction was 0.63D, and the average absolute error of astigmatism measurement was 0.28D. In addition, 22 subjects were enrolled to evaluate inter-pupillary distance (IPD) measurement with the app. The average absolute error in IPD measurement with the app was 1.2 mm. The protocol for measuring IPD with the app is also described.

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使用智能手机进行视力筛查的主观屈光测试。
为改善视力保健服务并实现大规模视力筛查,我们开发了一款测量屈光不正的智能手机应用程序。无需任何外部附件,非专业人员就可以使用这款在独立手机上运行的应用程序测量主观屈光度。该应用程序的有效性已在临床环境和服务不足的社区进行了试点测试。该应用程序通过测量辨别视觉刺激的远点距离来估算屈光不正。球面等效屈光度和散光可分别使用翻滚 E 字母和光栅图案进行测量。本文旨在介绍使用该应用程序进行主观屈光度测量的测量规程。本文介绍了对 34 名受试者(30 只眼睛进行球面等效测量,38 只眼睛进行散光评估)的实验结果。使用应用程序进行的测量与标准临床方法进行了比较。球面等效屈光度的平均绝对误差为 0.63D,散光测量的平均绝对误差为 0.28D。此外,还招募了 22 名受试者来评估该应用程序的瞳间距(IPD)测量结果。使用应用程序测量瞳距的平均绝对误差为 1.2 毫米。此外,还介绍了使用应用程序测量 IPD 的方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Jove-Journal of Visualized Experiments
Jove-Journal of Visualized Experiments MULTIDISCIPLINARY SCIENCES-
CiteScore
2.10
自引率
0.00%
发文量
992
期刊介绍: JoVE, the Journal of Visualized Experiments, is the world''s first peer reviewed scientific video journal. Established in 2006, JoVE is devoted to publishing scientific research in a visual format to help researchers overcome two of the biggest challenges facing the scientific research community today; poor reproducibility and the time and labor intensive nature of learning new experimental techniques.
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