Feasibility Study of Smartphone-Based Tear Volume Measurement System

Yoshiro Okazaki; Tatsuki Takenaga; Taku Miyake; Mamoru  Iwabuchi; Toshiyuki Okubo; Norihiko Yokoi

EAI Endorsed Transactions on Ambient Systems 17(16): e5

Research Article

Feasibility Study of Smartphone-Based Tear Volume Measurement System

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@ARTICLE{10.4108/eai.19-12-2017.153486,
    author={Yoshiro Okazaki and Tatsuki Takenaga and Taku Miyake and Mamoru  Iwabuchi and Toshiyuki Okubo and Norihiko Yokoi},
    title={Feasibility Study of Smartphone-Based Tear Volume Measurement System},
    journal={EAI Endorsed Transactions on Ambient Systems},
    volume={17},
    number={16},
    publisher={EAI},
    journal_a={AMSYS},
    year={2017},
    month={12},
    keywords={Smartphone, Tear volume, Dry eye, IoT device},
    doi={10.4108/eai.19-12-2017.153486}
}

Yoshiro Okazaki
Tatsuki Takenaga
Taku Miyake
Mamoru Iwabuchi
Toshiyuki Okubo
Norihiko Yokoi
Year: 2017
Feasibility Study of Smartphone-Based Tear Volume Measurement System
AMSYS
EAI
DOI: 10.4108/eai.19-12-2017.153486

Yoshiro Okazaki¹^,*, Tatsuki Takenaga¹, Taku Miyake¹, Mamoru Iwabuchi¹, Toshiyuki Okubo², Norihiko Yokoi³

1: Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
2: Ophthalmology, Tachikawa Sogo Hospital, 4-1 midori-cho, Tachikawa, Tokyo 190-8578, Japan
3: Department of Ophthalmology, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan,

*Contact email: yoshiro.okazaki.007@gmail.com

Abstract

Evaluation of tear volume is important for diagnosing dry eye disease. At the clinical site, dedicated devices such as slit lamp microscopy or Schirmer’s test strip have been used to quantify tear volume by ophthalmologist. However, these devices have access only in medical office and therefore have limited availability for the public. Tear volume changes with environmental, physical or psychological situation. For that reason, measurement of tear volume regardless of location, time or circumstances can be beneficial. In this study, a tear volume measurement system based on the principle of meniscometry was developed and implemented on the smartphone, and its feasibility was evaluated. It was shown that tear meniscus radii of 22 human subjects were calculated to be mean 0.31 (SD 0.06) mm which was within the range of the previous study. The results suggested the feasibility of tear volume measurement system using the smartphone based on the principle of meniscometry as an IoT sensor.

Keywords: Smartphone, Tear volume, Dry eye, IoT device

Received: 6th Dec 2017
Accepted: 12th Dec 2017
Published: 19th Dec 2017
Publisher: EAI

: http://dx.doi.org/10.4108/eai.19-12-2017.153486

Copyright © Yoshiro Okazaki et al., licensed to EAI. This is an open access article distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/3.0/), which permits unlimited use, distribution and reproduction in any medium so long as the original work is properly cited.