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1996 Fiscal Year Final Research Report Summary

The effectiveness of early surgery on binocular function in infantile esotropio

Research Project

Project/Area Number 07671920
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Ophthalmology
Research InstitutionOkayama University

Principal Investigator

HASEBE Satoshi  Okayama University Medical School Assistant Professor, 医学部・附属病院, 講師 (20263577)

Co-Investigator(Kenkyū-buntansha) OHTUKI Hiroshi  Okayama University Medical School Professor, 医学部, 教授 (70093672)
Project Period (FY) 1995 – 1996
Keywordsimage processing / infant / ocular alignment / strabismus / pupil
Research Abstract

1.To examine the reliability and usefulness of a video-based Hirschberg test under clinical conditions, we estimated eye deviation in 87 patient with strabismus through automated analysis of corneal reflex displacement. The repetability of measurement, the comparison with the PACT,and the distribution of the Hirschberg ratio were studied. The 95% limits of agreement of the video-based Hirschberg test evaluated by repeated measurements were (]SY.+-。[)0.18mm ((]SY.+-。[)2.2゚) for the horizontal deviation and (]SY.+-。[)0.28mm ((]SY.+-。[)3.4゚) for the vertical deviation. The 95% limits of agreement betweenthe Hirschberg measures and the PACT were within (]SY.+-。[)7.8゚. The average ((]SY.+-。[)SD) Hirschberg ratio was 12.3(]SY.+-。[)1.2゚/mm. The video-enhanced Hirschberg test shows good repeatability and ease of application, even in the testing infants. In quantitative analysis, however, systematic error from intersubject variance of the Hirschberg ratio should be taken into account.
2.To evaluate the usefulness of newly developped measurement of strabismic deviations based on the entrance pupil ellipticity, we estimate simulated eye deviation in 8 normal subjects with this technique, and analyzed measurement error. Strabismic deviation (rheta) and its measurement (phi) were highly correlated (r=0.86, p<0.001). A linear regression function (phi=0.71rheta+4.39) was obtaied ; its MRS error was 5.6 degrees. This technique has the advantage of providing sys deviation without any scale factor. However note should be taken of possible measurement error deriving from refractive distortion of the pupillary image, and random measurement error from inadequate threshold level.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] Satoshi Hasebe et al: "The reliability of a video-enhanced Hirschberg test under clinical conditions" Investigative Ophthalmology&Visual Science. 36・13. 2678-2685 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 長谷部 聡・他: "ビデオ画像計測で求めた健常者149眼のヒルシュベルグ眼位換算値" 臨床眼科. 51・10. 1743-1746 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 長谷部 聡・他: "みかけの瞳孔形状を基準とする眼位ずれの画像計測" 日本眼科紀要. 48・9. 1026-1030 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 長谷部 聡・他: "動的ランダムドットステレオグラムによる視運動性眼振の誘発" 臨床眼科. 50・8. 1489-1492 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 長谷部 聡・他: "ヒルシュベルグ法による眼位測定の限界" 臨床眼科. 50・3. 421-424 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Satoshi Hasebe, Hiroshi Ohtsuki, Yasunori Tadokoro, Masaki Okano, Takashi Furuse: "The Reliability of a Video-Enhanced Hirschberg Test under Clinical Conditions" Investigative Ophthalmology & Visual Science. 36-13. 2678-3685 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Satoshi Hasebe, Hiroshi Ohtsuki, Youzo Tsuchida, Takashi Furuse, Reika Kono, Tsuyoshi Tanaka: "A Video-Based Measurement of Simulated Strabismic Deviations Based on Shape of Apparant Pupil" Folia Ophthalmolgica Japan. 48-9. 1026-1030 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Satoshi Hasebe, Hiroshi Ohtsuki, Takashi Furuse, Masaki Okano, Tsuyoshi Tanaka, Yumiko Okada: "Optokinetic Mystagmus Induced by Dynamic Random Dot Stereogram" Rinsho Ganka. 50-8. 1489-1492 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Satoshi Hasebe, Hiroshi Ohtsuki, Yasunori Tadokoro, Takashi Furuse, Tsuyoshi Tanaka: "Limitation in Preceision of Hirschberg Eye Position Test" Rinsho Ganka. 50-3. 421-424 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Satoshi Hasebe, Hiroshi Ohtsuki, Takashi Furuse, Reika Kono, Tsuyoshi Tanaka, Yumiko: "The Hirschberg Conversion Ratio of 149 Normal Eyes Eestimated with Video-Based Technique" Rinsho Ganka. 50-10. 1743-1746 (1996)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-16  

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