Share Email Print
cover

Proceedings Paper

Image sensor for testing refractive error of eyes
Author(s): Xiangning Li; Jiabi Chen; Longyun Xu
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper 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.

Paper Details

Date Published: 9 May 2000
PDF: 4 pages
Proc. SPIE 4077, International Conference on Sensors and Control Techniques (ICSC 2000), (9 May 2000); doi: 10.1117/12.385577
Show Author Affiliations
Xiangning Li, Shanghai Univ. of Science and Technology (China)
Jiabi Chen, Shanghai Univ. of Science and Technology (China)
Longyun Xu, Shanghai Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 4077:
International Conference on Sensors and Control Techniques (ICSC 2000)
Desheng Jiang; Anbo Wang, Editor(s)

© SPIE. Terms of Use
Back to Top