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Paper Abstract and Keywords
Presentation 2011-03-07 13:20
Waveform Shapes for Pupil Light Responses and Their Analyzing Procedure
Minoru Nakayama (Tokyo Tech), Wioletta Nowak (Wroclaw Tech.), Hitoshi Ishikawa, Ken Asakawa, Yoshiaki Ichibe (Kitasato Univ.) MBE2010-103
Abstract (in Japanese) (See Japanese page) 
(in English) The waveform of the Pupil Light Response (PLR) to chromatic stimuli is recognized as an activity of the melanopsin-associated photoreceptive system. This report determines the difference in quantitative description of the PLR waveforms between healthy subjects and patients with Age-Related Macular Degeneration (AMD). The features of waveform shapes were extracted using Fourier descriptors, and the degrees of unsimilarity were defined as the Eucrid distance between two waveform shapes across four stimuli and both eyes. To create scales to compare stimuli and subjects, Multidimensional Scaling (MDS) was applied to the distance metrices. As a result, some difference appeared on a scale between healthy and patient subjects. This provides a possibility to detect a sympton using PLR for the stimuli.
Keyword (in Japanese) (See Japanese page) 
(in English) Pupil Light Reflex / Age-Related Macular Degeneration / Waveform shape / Fourier Descriptor / Multidimensional Scaling / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 460, MBE2010-103, pp. 1-6, March 2011.
Paper # MBE2010-103 
Date of Issue 2011-02-28 (MBE) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee NC MBE  
Conference Date 2011-03-07 - 2011-03-09 
Place (in Japanese) (See Japanese page) 
Place (in English) Tamagawa University 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MBE 
Conference Code 2011-03-NC-MBE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Waveform Shapes for Pupil Light Responses and Their Analyzing Procedure 
Sub Title (in English)  
Keyword(1) Pupil Light Reflex  
Keyword(2) Age-Related Macular Degeneration  
Keyword(3) Waveform shape  
Keyword(4) Fourier Descriptor  
Keyword(5) Multidimensional Scaling  
1st Author's Name Minoru Nakayama  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
2nd Author's Name Wioletta Nowak  
2nd Author's Affiliation Wroclaw University of Technology (Wroclaw Tech.)
3rd Author's Name Hitoshi Ishikawa  
3rd Author's Affiliation Kitasato University (Kitasato Univ.)
4th Author's Name Ken Asakawa  
4th Author's Affiliation Kitasato University (Kitasato Univ.)
5th Author's Name Yoshiaki Ichibe  
5th Author's Affiliation Kitasato University (Kitasato Univ.)
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Date Time 2011-03-07 13:20:00 
Presentation Time 25 
Registration for MBE 
Paper # IEICE-MBE2010-103 
Volume (vol) IEICE-110 
Number (no) no.460 
Page pp.1-6 
#Pages IEICE-6 
Date of Issue IEICE-MBE-2011-02-28 

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