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涙液油層の動態解析法の開発と涙液油層動態決定因子の探索的研究

Research Project

Project/Area Number 21659402
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeSingle-year Grants
Research Field Ophthalmology
Research InstitutionKyoto Prefectural University of Medicine

Principal Investigator

横井 則彦  京都府立医科大学, 医学研究科, 准教授 (60191491)

Project Period (FY) 2009 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 2010: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2009: ¥1,800,000 (Direct Cost: ¥1,800,000)
Keywords涙液 / 油層 / レオロジー / 光干渉 / 生理学
Research Abstract

本年度は、重症涙液減少型ドライアイに対する涙点閉鎖前・後の涙液評価、ならびに、本邦では認識されているが、海外ではほとんど認識されていないBUT(breakup time)短縮型ドライアイと他のBUT異常(BUT<=5秒)眼との違いの検討をテーマとして、前年度に確立した画像相関法(cross-correlation)を用いた涙液油層伸展初速度の計測法の応用を試みた。涙液油層伸展初速度の測定としては、まず、涙液油層観察装置(DR-1)を用いて涙液油層の観察所見をデジタル録画し、次に、画像相関法を用いて涙液油層の上方への伸展移動距離の時間変化を求め、その実測値をレオロジーのVoigt modelに当てはめ、独自にプログラムされたソフトウエア上で初速度を計測した。また、開瞼を10秒間まで維持させて涙液の自然破壊時間(Non-invasive breakup time : NIBUT)を測定することによって、涙液の安定性を非侵襲的、かつ定量的に評価しうる方法を開発した。本法の確立によって、1回の瞬目で、涙液についての2つの非侵襲的かつ定量的情報を得ることができるようになった。そして、本法を、重症涙液減少型ドライアイの上・下涙点閉鎖の前・後、あるいは、BUT短縮型ドライアイ、および、他のBUT異常眼の涙液評価に適用した。その結果、涙点閉鎖の前・後で、涙液油層伸展初速度およびNIBUTが有意に増加することが明らかになるとともに、BUT短縮型ドライアイにおいて、他のBUT異常眼に比べて、涙液油層伸展初速度が有意に速いこと、ならびに、涙液油層伸展初速度、NIBUT、眼表面の上皮障害スコアを変数とする線形判別式で、BUT短縮型ドライアイと他のBUT異常眼の判別が行える可能性が明らかになった。

Report

(2 results)
  • 2010 Annual Research Report
  • 2009 Annual Research Report
  • Research Products

    (11 results)

All 2011 2010 2009

All Journal Article (6 results) (of which Peer Reviewed: 5 results) Presentation (4 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] The international workshop on meibomian gland dysfunction : report of the diagnosis subcommittee2011

    • Author(s)
      Tomlinson A, Bron AJ, Korb DR, Amano S, Paugh JR, Pearce ET, Yee R, Yokoi N, Arita R, Dogru M
    • Journal Title

      Invest Ophthalmol Vis.Sci.

      Volume: 52 Pages: 2006-2049

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A solute gradient in the tear meniscus. I. A Hypothesis to explain Marx's line2011

    • Author(s)
      Bron AJ, Yokoi N, Gaffney EA, Tiffany JM.
    • Journal Title

      Ocul Surf

      Volume: 9 Pages: 70-91

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A solute gradient in the tear meniscus. II. A Hypothesis to explain Marx's line2011

    • Author(s)
      Bron AJ, Yokoi N, Gaffney EA, Tiffany JM.
    • Journal Title

      Ocul Surf

      Volume: 9 Pages: 92-97

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 涙液の液層と油層の密接な関係2010

    • Author(s)
      横井則彦, Georgi As Georgiev
    • Journal Title

      眼科

      Volume: 52 Pages: 1763-1770

    • Related Report
      2010 Annual Research Report
  • [Journal Article] A mass and solute balance model for tear volume and osmolarity in The normal and the dry eye2010

    • Author(s)
      Gaffney E, Tiffany JM, Yokoi N, Bron AJ
    • Journal Title

      Prog. Retina and Eye Res 29

      Pages: 59-78

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Predicted phenotypes of dry eye : Proposed consequences of its natural history2009

    • Author(s)
      Bron AJ, Yokoi N, Gaffney E, Tiffany JM
    • Journal Title

      Ocul Surf 7

      Pages: 78-92

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Presentation] Non-invasive and quantitative assessment of pre-corneal tear film2010

    • Author(s)
      Yokoi N
    • Organizer
      The 2nd Asia Cornea Society Biennial Scientific Meeting
    • Place of Presentation
      Kyoto
    • Year and Date
      2010-12-03
    • Related Report
      2010 Annual Research Report
  • [Presentation] Effect of punctual occlusion on lipid-layer spread and tear film stability in aqueous tear deficient dry eye2010

    • Author(s)
      Yokoi N, Sakai R, Bron AJ, Tiffany JM, Georgiev GAs, Kinoshita S
    • Organizer
      6th Internatinal Conference on the Tear Film & Ocular Surface : Basic Science and Clinical Relevance
    • Place of Presentation
      Florence, Italy
    • Year and Date
      2010-09-24
    • Related Report
      2010 Annual Research Report
  • [Presentation] Possible factors that determine precorneal tear film stability2010

    • Author(s)
      Yokoi N, Sakai R, Kinoshita S, Mizukusa Y, Bron AJ, Tiffany JM, Georgiev GAs
    • Organizer
      The Association for Research in Vision and Ophthalmology
    • Place of Presentation
      Fort Lauderdale, U.S.A.
    • Year and Date
      2010-05-06
    • Related Report
      2010 Annual Research Report
  • [Presentation] Rheological analysis of tear-film lipid-layer spread and its relationship to tear volume2009

    • Author(s)
      Yokoi N
    • Organizer
      Solving dry eye An international exchange
    • Place of Presentation
      Sydney, Australia
    • Year and Date
      2009-08-06
    • Related Report
      2009 Annual Research Report
  • [Patent(Industrial Property Rights)] 眼科装置2009

    • Inventor(s)
      横井則彦、木下茂、水草豊
    • Industrial Property Rights Holder
      横井則彦、木下茂、水草豊
    • Industrial Property Number
      2010-018380
    • Filing Date
      2009-01-22
    • Related Report
      2009 Annual Research Report

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Published: 2009-04-01   Modified: 2016-04-21  

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