Optical Sensor to Monitor Pupillary Light Reflex

• Authors: K. Różanowski , K. Murawski
• Languages of publication: EN

Abstracts

EN

The aim of the paper is to describe design of an optical sensor intended to analyze pupillary light reflex. It also presents the results of physiological adaptation mechanisms in human eye, i.e. response of the iris to changes in the intensity of light that falls on the retina of the eye under conditions of sensory deprivation. Pupillary light reflex is a closed loop nerve reflex. It controls the amount of light that reaches the retina. Based on the test results, an optical sensor was designed, fabricated and correctly calibrated. In comparative tests with the use of F^2D Fit-For-Duty, a commercial system by AMTech, selected pupillographic parameters were primarily evaluated (baseline pupil diameter, oscillations, reflex latency, maximum reaction time, pupil constriction time, pupil dilation time, and constriction amplitude) under conditions of diminished alertness, reduced ability to concentrate, increasing fatigue, and drowsiness. The solution comes as part of a mobile pupillography device intended to be assembled in cars and airplanes to identify conditions of lower alertness, reduced ability to concentrate, increasing fatigue and drowsiness in drivers, pilots and traffic controllers, and to trigger alarm and preventive measures, if necessary.

Keywords

EN

42.66.Ct; 42.30.Va; 07.05.Pj

Discipline

• 42.66.Ct: Anatomy and optics of eye
• 42.30.Va: Image forming and processing
• 07.05.Pj: Image processing(see also 42.30.Va in optics; 87.57.-s Medical imaging in biological and medical physics; 95.75.Tv Digitization techniques in astronomy)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2013
• Volume: 124
• Issue: 3
• Pages: 558-562

Dates

published

2013-09

Contributors

author

K. Różanowski

• Military Institute of Aviation Medicine, Aviation Bioengineering Department, Z. Krasińskiego 54, 01-755 Warsaw, Poland

author

K. Murawski

• Military University of Technology, Institute of Teleinformatics and Automatics, S. Kaliskiego 2, 00-908 Warsaw, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.124.558