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A model for estimating corneal stiffness using an indenter.

P H Carnell1, R P Vito

  • 1School of Mechanical Engineering, Georgia Institute of Technology, Atlanta 30332.

Journal of Biomechanical Engineering
|November 1, 1992
PubMed
Summary
This summary is machine-generated.

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A finite element model was developed to simulate corneal indentation, showing that mechanical properties can be determined from indentation data. This research demonstrates the feasibility of using force and contact area measurements to calculate the cornea's secant modulus.

Area of Science:

  • Biomechanics
  • Biomaterials Science
  • Ophthalmology

Background:

  • Corneal mechanical properties are crucial for understanding ocular biomechanics and disease.
  • Non-invasive methods for assessing corneal mechanical properties are highly desirable.

Purpose of the Study:

  • To investigate the feasibility of determining corneal mechanical properties using indentation data.
  • To develop and validate a computational model for corneal indentation simulation.

Main Methods:

  • A layered finite element model of the cornea was created, incorporating geometric nonlinearities.
  • Simulations of the indentation process were performed using the developed model.

Main Results:

  • The finite element model accurately simulated corneal indentation.

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  • Results indicate that the secant modulus of the cornea can be determined by measuring indenter force and contact area.

    • Conclusions:

    • Indentation data holds significant potential for non-invasively assessing corneal mechanical properties.
    • The developed finite element model provides a viable approach for analyzing corneal biomechanics through indentation testing.