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This study aims to obtain a parametric three-dimensional (3D) model of the human crystalline lens using 3D scanning and digital modelling techniques. Several different scanning technologies were tested, in order to determine which would be the most suitable, in terms of processing the generated point cloud and later creation of the parametrizable solid model for morpho-geometric analysis. The study was conducted in the 3D scanning laboratory of the Industrial Design and Scientific Calculation Service (SEDIC) of the Technical University of Cartagena, using five scanners employing different technologies (structured light, laser, and infrared). Samples, including a lentil for initial testing and a human crystalline lens, were scanned under controlled lighting and temperature conditions. The point clouds obtained were processed with specialized software (Rhinoceros) to generate digital meshes, being later transformed into solid models using CAD modelling techniques (SolidWorks). Geometric and physical parameters of the models were evaluated, to establish their quality and applicability in the healthcare field. Significant differences were found in the precision and resolution of the models generated by each scanner. Structured blue light-based scanners, such as the Artec SPIDER, demonstrated a higher ability to capture fine details of the crystalline lens compared to infrared or white light technologies. The generated models allowed precise measurements of geometric parameters, such as volume and areas, which are essential for clinical and research applications. Additionally, the advantages and limitations of each technology were documented based on the characteristics of the scanned object. Results suggest that 3D scanning technologies based on structured blue light are the most suitable for the digitization and modelling of the human crystalline lens. The developed methodological approach not only enables the generation of precise solid models, but also has potential applications in medicine, such as the design of personalized lenses or the optimization of ophthalmological treatments.

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Procedure for Solid Modelling and Morpho-Geometric Analysis of a Crystalline Lens Using 3D Scanning and Digitization Techniques

  • 会议论文

  • 发表日期：

    2026年

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  • José Velázquez,
  • Dolores Ojados,
  • Adrián Semitiel,
  • Francisco Sáez,
  • Francisco Cavas

摘要

This study aims to obtain a parametric three-dimensional (3D) model of the human crystalline lens using 3D scanning and digital modelling techniques. Several different scanning technologies were tested, in order to determine which would be the most suitable, in terms of processing the generated point cloud and later creation of the parametrizable solid model for morpho-geometric analysis. The study was conducted in the 3D scanning laboratory of the Industrial Design and Scientific Calculation Service (SEDIC) of the Technical University of Cartagena, using five scanners employing different technologies (structured light, laser, and infrared). Samples, including a lentil for initial testing and a human crystalline lens, were scanned under controlled lighting and temperature conditions. The point clouds obtained were processed with specialized software (Rhinoceros) to generate digital meshes, being later transformed into solid models using CAD modelling techniques (SolidWorks). Geometric and physical parameters of the models were evaluated, to establish their quality and applicability in the healthcare field. Significant differences were found in the precision and resolution of the models generated by each scanner. Structured blue light-based scanners, such as the Artec SPIDER, demonstrated a higher ability to capture fine details of the crystalline lens compared to infrared or white light technologies. The generated models allowed precise measurements of geometric parameters, such as volume and areas, which are essential for clinical and research applications. Additionally, the advantages and limitations of each technology were documented based on the characteristics of the scanned object. Results suggest that 3D scanning technologies based on structured blue light are the most suitable for the digitization and modelling of the human crystalline lens. The developed methodological approach not only enables the generation of precise solid models, but also has potential applications in medicine, such as the design of personalized lenses or the optimization of ophthalmological treatments.