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2D eyelids pressure measuring system using sucrose coated contact lenses

Research Project

Project/Area Number 21K12663
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 90110:Biomedical engineering-related
Research InstitutionTokyo Institute of Technology

Principal Investigator

Hatsuzawa Takeshi  東京工業大学, 科学技術創成研究院, 教授 (70272721)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords眼瞼圧分布測定 / 擦過試験 / スクロース膜 / コンタクトレンズ / 画像計測システム / 眼瞼圧2次元分布測定 / 砂糖スクロース膜 / 画像測定系 / 膜厚減少検量線 / 眼瞼圧2次元分布測定 砂糖スクロース膜 擦過試験 / スクロースコート膜
Outline of Research at the Start

ドライアイや角膜障害の診断に重要な眼瞼の接触状態を明らかにするため,砂糖を用いたコンタクトレンズコートまたは砂糖を成型したコンタクトレンズを用い,接触部の圧力分布を測定可能な診断システムを構築する.

砂糖スクロース膜の成形条件につき金型を製作して実験的に明らかにするとともに,瞼の動きを模倣した球面擦過試験装置を作製する.また高解像度撮像カメラ系による膜厚分布計測・表示系を構築し,臨床診断用のプロトタイプを製作する.

Outline of Final Research Achievements

In this study, we proposed a measurement system that measures the two-dimensional distribution of eyelid pressure on the eyeball, for which no measurement method existed until now, using a contact lens coated with a sugar sucrose film and an image processing system. Using a testing device, we clarified the effects of pressure and frequency on sucrose film thickness reduction, and obtained a calibration curve for film thickness reduction and eyelid pressure. We also established a method of casting lenses using precision molds, and developed a method of bonding them to contact lenses using water droplets. The measurement principle and safety were verified through animal experiments using rabbits, and the measurement principle and biological safety proposed by this method were confirmed.

Academic Significance and Societal Importance of the Research Achievements

眼科などでの角膜障害にかかわる疾患は,コロナ下でのPC作業や社会のDX化により罹患率が増える傾向にある.従来,角膜上の傷はフルオロセインなどの色素を点眼することにより診断可能であったが,眼瞼圧との関連は不明であった.またMEMSセンサなども存在したが,1点のみの測定や眼圧測定を行うものであった.本研究では眼球上の眼瞼圧を短時間で2次元的に測定する手法について動物実験まで含めて実験的に検証したものであり,将来的な医療機器開発の基礎資料として意味を持つ.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (8 results)

All 2024 2023 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (6 results) (of which Int'l Joint Research: 1 results,  Invited: 4 results)

  • [Journal Article] Measurement Method of Eyelid Pressure Distribution Using Thin Film Coating on Contact Lenses2023

    • Author(s)
      初澤 毅,森 優太
    • Journal Title

      Journal of the Japan Society for Precision Engineering

      Volume: 89 Issue: 8 Pages: 661-664

    • DOI

      10.2493/jjspe.89.661

    • ISSN
      0912-0289, 1882-675X
    • Year and Date
      2023-08-05
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Measurement Method of Eyelid Pressure Distribution Using Thin Film Coating on Contact Lenses2021

    • Author(s)
      MORI Yuta、HATSUZAWA Takeshi
    • Journal Title

      Journal of the Japan Society for Precision Engineering

      Volume: 87 Issue: 10 Pages: 840-844

    • DOI

      10.2493/jjspe.87.840

    • NAID

      130008101164

    • ISSN
      0912-0289, 1882-675X
    • Year and Date
      2021-10-05
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 精密加工・センサ技術の医療現場への応用2024

    • Author(s)
      初澤 毅
    • Organizer
      令和5年度第4回名古屋産学官・医連携研究会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 臨床応用を志向したセンシングツール2024

    • Author(s)
      初澤 毅
    • Organizer
      2023年度生体医歯工学共同研究拠点成果報告会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 精密工学とバイオ計測・医療診断技術2024

    • Author(s)
      初澤 毅
    • Organizer
      2024年度精密工学会秋季大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 精密工学の医療機器への応用2023

    • Author(s)
      初澤 毅
    • Organizer
      2023年度精密工学会秋季大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] A Novel Method for 2D Eyelid Pressure Measurement Using Spherical Sucrose Lenses2022

    • Author(s)
      Yuta MORI, Takeshi HATSUZAWA
    • Organizer
      ICPE2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] スクロース球面レンズを用いた眼瞼圧分布測定2022

    • Author(s)
      森優太,初澤毅
    • Organizer
      2022年度精密工学会春季大会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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