A new apparatus of infrared videopupillography for monitoring pupil size

M.-L. Ko; T.-W. Huang; Y.-Y. Chen; B.-S. Sone; Y.-C. Huang; W.-D. Jeng; Y.-T. Chen; Y.-F. Hsieh; K.-H. Tao; S.-T. Li; M. Ou-Yang; J.-C. Chiou

doi:10.1117/12.2023868

26 September 2013 A new apparatus of infrared videopupillography for monitoring pupil size

M.-L. Ko, T.-W. Huang, Y.-Y. Chen, B.-S. Sone, Y.-C. Huang, W.-D. Jeng, Y.-T. Chen, Y.-F. Hsieh, K.-H. Tao, S.-T. Li, M. Ou-Yang, J.-C. Chiou

Author Affiliations +

Proceedings Volume 8853, Medical Applications of Radiation Detectors III; 88530I (2013) https://doi.org/10.1117/12.2023868
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

Glaucoma was diagnosed or tracked by the intraocular pressure (IOP) generally because it is one of the physiology parameters that are associated with glaucoma. But measurement of IOP is not easy and consistence under different measure conditions. An infrared videopupillography is apparatus to monitor the pupil size in an attempt to bypass the direct IOP measurement. This paper propose an infrared videopupillography to monitoring the pupil size of different light stimulus in dark room. The portable infrared videopupillography contains a camera, a beam splitter, the visible-light LEDs for stimulating the eyes, and the infrared LEDs for lighting the eyes. It is lighter and smaller than the present product. It can modulate for different locations of different eyes, and can be mounted on any eyeglass frame. An analysis program of pupil size can evaluate the pupil diameter by image correlation. In our experiments, the eye diameter curves were not smooth and jagged. It caused by the light spots, lone eyelashes, and blink. In the future, we will improve the analysis program of pupil size and seek the approach to solve the LED light spots. And we hope this infrared videopupillography proposed in this paper can be a measuring platform to explore the relations between the different diseases and pupil response.

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M.-L. Ko, T.-W. Huang, Y.-Y. Chen, B.-S. Sone, Y.-C. Huang, W.-D. Jeng, Y.-T. Chen, Y.-F. Hsieh, K.-H. Tao, S.-T. Li, M. Ou-Yang, and J.-C. Chiou "A new apparatus of infrared videopupillography for monitoring pupil size", Proc. SPIE 8853, Medical Applications of Radiation Detectors III, 88530I (26 September 2013); https://doi.org/10.1117/12.2023868

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KEYWORDS

Infrared radiation

Infrared imaging

Light emitting diodes

Eye

Modulation

Image processing

Visible radiation

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