[Design of a Smartphone-Based Portable Corneal Topography Device].

Q4 Medicine

中国医疗器械杂志 Pub Date : 2026-09-30 DOI:10.12455/j.issn.1671-7104.260178

Xiaojie Zhou, Man Chen, Jialin Shen, Peiming Zhang, Li Wang

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引用次数: 0

Abstract

Objective: Aiming at the problems of large size, high cost, and poor mobility of traditional corneal topographers, a smartphone-based portable corneal topography device was designed to provide a low-cost and convenient tool for large-scale preliminary screening of corneal diseases.

Methods: A small conical Placido disk was used as the core optical component. Its ring distribution was optimized by Matlab and verified by OptisWorks optical simulation, and the miniaturized processing of the Placido disk was realized by laser printing and a PMMA support structure. The device shell was modeled based on SolidWorks and fabricated by 3D printing technology. A red light-emitting diode (LED) lighting system was then designed, arranged in parallel along the angle of the Placido cone and powered by a smartphone to achieve precise adaptation between the device and the smartphone.

Results: The processing errors of the key dimensions of the acrylic cone were small, all less than 0.2 mm. The LED lighting system had a uniform irradiance distribution, and the photobiological safety verification showed that it met the non-hazardous standards. The standard deviation for corneal topography detection was 0.034, which complied with the specifications.

Conclusion: The portable corneal topography device designed in this study meets the measurement standards, achieves miniaturization, low cost, and high adaptability, with uniform and safe lighting, laying a foundation for the practical application of portable corneal topography devices.

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一种基于智能手机的便携式角膜地形仪的设计

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来源期刊

中国医疗器械杂志 Medicine-Medicine (all)

CiteScore

0.40

自引率

0.00%

发文量

8086

期刊介绍： Chinese Journal of Medical Instrumentation mainly reports on the development, progress, research and development, production, clinical application, management, and maintenance of medical devices and biomedical engineering. Its aim is to promote the exchange of information on medical devices and biomedical engineering in China and turn the journal into a high-quality academic journal that leads academic directions and advocates academic debates.