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Variable Complexity Corneal Surfaces Characterization by Modal Geometrical Reconstruction Methods: Comparative Study

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Advances in Design Engineering II (INGEGRAF 2021)

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

Abstract

Validation of new methods for keratoconus diagnosis has generated a great interest for the last years in the field of ophthalmology. Corneal surface reconstruction by discrete 3D points creates the possibility to apply modal or zonal geometrical methods. The goal of this work is to determine the geometrical behavior of the cornea in each keratoconus stage by different modal geometrical models, mainly, those derived from the general equation of the biconical and its associated parameters. This study included a total amount of 75 eyes, 20 of these were healthy eyes and 55 classified with keratoconus pathology by using Amsler-Krumeich classification. After studying the proposed models, the biconical model showed the best fit model while spherical model showed the worst fit one. By assessing geometrical parameters from biconical model, curvature radius and asphericity in the main direction, the geometrical corneal behavior can be assessed in each keratoconus stage in both anterior and posterior cornea. Using a variable reduction in two parameters, mean radius and mean asphericity, a decreasing trend in both parameters with keratoconus progress is found. Therefore, this study proposes to validate the biconical model for variable complexity surfaces with keratoconus pathology as a tool for diagnosis in clinical practice.

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Author information

Authors and Affiliations

  1. International School of Doctorate, Technical University of Cartagena, 30202, Cartagena, Spain

    Alejandro Ballesta

  2. Cornea, Cataract and Refractive Surgery Department, VISSUM, Alicante, Spain

    Jorge Alió

  3. Technological Centre of Information Technologies and Communications (CENTIC), Science Park of Murcia, 30100, Murcia, Spain

    Jose Miguel Bolarín

  4. Department of Structures, Construction and Graphical Expression, Technical University of Cartagena, Cartagena, Spain

    Francisco Cavas

Authors
  1. Alejandro Ballesta
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  2. Jorge Alió
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  3. Jose Miguel Bolarín
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  4. Francisco Cavas
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Corresponding author

Correspondence to Alejandro Ballesta .

Editor information

Editors and Affiliations

  1. Departamento de Estructuras, Construcción y Expresión Gráfica Universidad Politécnica de Cartagena, Cartagena, Spain

    Francisco Cavas Martínez

  2. CITG. Centro de Investigación en Tecnologías Gráficas, Universitat Politècnica de València, Valencia, Spain

    Guillermo Peris-Fajarnes

  3. Departamento de Mecánica, Tecnun - Universidad de Navarra, San Sebastián - Donostia, Guipúzcoa, Spain

    Paz Morer Camo

  4. Departamento de Ingeniería Gráfica, Universitat Politècnica de València, Valencia, Spain

    Ismael Lengua Lengua

  5. Departamento de Ingeniería Gráfica, Universitat Politècnica de València, Valencia, Spain

    Beatriz Defez García

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Ballesta, A., Alió, J., Bolarín, J.M., Cavas, F. (2022). Variable Complexity Corneal Surfaces Characterization by Modal Geometrical Reconstruction Methods: Comparative Study. In: Cavas Martínez, F., Peris-Fajarnes, G., Morer Camo, P., Lengua Lengua, I., Defez García, B. (eds) Advances in Design Engineering II. INGEGRAF 2021. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-92426-3_28

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  • DOI: https://doi.org/10.1007/978-3-030-92426-3_28

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-92425-6

  • Online ISBN: 978-3-030-92426-3

  • eBook Packages: EngineeringEngineering (R0)

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