Image sensor for testing refractive error of eyes

Xiangning Li; Jiabi Chen; Longyun Xu

doi:10.1117/12.385577

9 May 2000 Image sensor for testing refractive error of eyes

Xiangning Li, Jiabi Chen, Longyun Xu

Proceedings Volume 4077, International Conference on Sensors and Control Techniques (ICSC 2000); (2000) https://doi.org/10.1117/12.385577
Event: International Conference on Sensors and Control Techniques (ICSC2000), 2000, Wuhan, China

Abstract

It is difficult to detect ametropia and anisometropia for children. Image sensor for testing refractive error of eyes does not need the cooperation of children and can be used to do the general survey of ametropia and anisometropia for children. In our study, photographs are recorded by a CCD element in a digital form which can be directly processed by a computer. In order to process the image accurately by digital technique, formula considering the effect of extended light source and the size of lens aperture has been deduced, which is more reliable in practice. Computer simulation of the image sensing is made to verify the fineness of the results.

Citation Download Citation

Xiangning Li, Jiabi Chen, and Longyun Xu "Image sensor for testing refractive error of eyes", Proc. SPIE 4077, International Conference on Sensors and Control Techniques (ICSC 2000), (9 May 2000); https://doi.org/10.1117/12.385577

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