An improved apparatus of infrared videopupillography for monitoring pupil size

T. W. Huang*, M. L. Ko, Y. Ouyang, Y. Y. Chen, B. S. Sone, Yang-Mang Ou, Jin-Chern Chiou

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The intraocular pressure (IOP) that can diagnose or track glaucoma generally because it is one of the physiology parameters that are associated with glaucoma. But IOP is not easy and consistence to be measured under different measure conditions. Besides, diabetes is associated with diabetic autonomic neuropathy (DAN). Pupil size response might provide an indirect means about neuronal pathways, so the abnormal pupil size may relate with DAN. Hence an infrared videopupillography is needed for tracking glaucoma and exploring the relation between pupil size and DAN. Our previous research proposed an infrared videopupillography to monitoring the pupil size of different light stimulus in dark room. And this 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 can be mounted on any eyeglass frame. But it can modulate only two dimensions, we cannot zoom in/out the eyes. Moreover, the eye diameter curves were not smooth and jagged because of the light spots, lone eyelashes, and blink. Therefore, we redesign the optical path of our device to have three dimension modulation. Then we can zoom in the eye to increase the eye resolution and to avoid the LED light spots. The light spot could be solved by defining the distance between IR LED and CCD. This device smaller volume and less prices of our previous videopupillography. We hope this new infrared videopupillography proposed in this paper can achieving early detection about autonomic neuropathy in the future.

Original languageEnglish
Title of host publicationInfrared Sensors, Devices, and Applications IV
EditorsArvind I. D'Souza, Priyalal Wijewarnasuriya, Paul D. LeVan, Ashok K. Sood
ISBN (Electronic)9781628412475
StatePublished - 2014
EventInfrared Sensors, Devices, and Applications IV - San Diego, United States
Duration: 18 Aug 201420 Aug 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceInfrared Sensors, Devices, and Applications IV
Country/TerritoryUnited States
CitySan Diego


  • Glaucoma
  • intraocular pressure
  • pupil
  • pupil size
  • pupillometer
  • videopupillography


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