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Anatomical Placement of the Human Eyeball in the Orbit—Validation Using CT Scans of Living Adults and Prediction for Facial Approximation

Authors

  • Pierre Guyomarc’h M.Sc.,

    1. Université Bordeaux 1, UMR 5199 - PACEA, Anthropologie des Populations Passées et Présentes (A3P), Avenue des Facultés, Bâtiment B8, 33405 Talence Cedex, France.
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  • Bruno Dutailly M.Sc.,

    1. Université Bordeaux 1, UMR 5199 - PACEA, Anthropologie des Populations Passées et Présentes (A3P), Avenue des Facultés, Bâtiment B8, 33405 Talence Cedex, France.
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  • Christine Couture Ph.D.,

    1. Université Bordeaux 1, UMR 5199 - PACEA, Anthropologie des Populations Passées et Présentes (A3P), Avenue des Facultés, Bâtiment B8, 33405 Talence Cedex, France.
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  • Hélène Coqueugniot Ph.D.

    1. Université Bordeaux 1, UMR 5199 - PACEA, Anthropologie des Populations Passées et Présentes (A3P), Avenue des Facultés, Bâtiment B8, 33405 Talence Cedex, France.
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  • Financial support for this work has been provided by a PhD scholarship granted by the French Ministry of Research (Ministére de l'Enseignement Supérieur et de la Recherche), and a BQR (Bonus Qualité Recherche “Reconstitution faciale par imagerie 3D”, Université Bordeaux 1).

Additional information and reprint requests:
Pierre Guyomarc’h, M.Sc.
Université Bordeaux 1
UMR 5199 - PACEA
Anthropologie des Populations Passées et Présentes (A3P)
Avenue des Facultés
Bâtiment B8
33405 Talence Cedex
France
E-mail: pierreguyo@gmail.com

Abstract

Abstract:  Accuracy of forensic facial approximation and superimposition techniques relies on the knowledge of anatomical correlations between soft and hard tissues. Recent studies by Stephan and collaborators (6,8,10) reviewed traditional guidelines leading to a wrong placement of the eyeball in the orbit. As those statements are based on a small cadaver sample, we propose a validation of these findings on a large database (n = 375) of living people. Computed tomography scans of known age and sex subjects were used to collect landmarks on three-dimensional surfaces and DICOM with TIVMI. Results confirmed a more superior and lateral position of the eyeball relatively to the orbital rims. Orbital height and breadth were used to compute regression formulae and proportional placement using percentages to find the most probable position of the eyeball in the orbit. A size-related sexual dimorphism was present but did not impact on the prediction accuracy.

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