Introduction
Bimonthly, started in 1957
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
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Numerical Simulation of Factors Influencing the Effectiveness of Orthokeratology Lens Correction
DOI:
10.16355/j.tyut.1007-9432.20230303
Received:
Accepted:
| Corresponding author | Institute | |
| WANG Xiaojun | College of Mechanical and Vehicle Engineering， Taiyuan University of Techndogy |
abstract:
【Purposes】The corneal shape and mechanical properties of cornea and contact lens material have a certain impact on the correction effect of contact lens.【Methods】In this paper，a finite element model of corneal wearing orthokeratology lens was established by using hyperelasticity materials，and the biomechanical response of cornea after wearinglens was analyzed by changing the shape of cornea（different curvature and thickness）and the material parameters of cornea and orthokeratology lens.【Findings】The results showed that when the corneal curvature changed 4 m-1，the displacement difference at apex of the cornea central area changed by 15.7 μm，and when the corneal thickness changed by 75 μm，the displacement difference at apex of the central area changed by 12.3 μm；when the corneal material parameter
increased by 3 times，the change of displacement difference at apex of the cornea central area was 39.2 μm，when the
value increased by 4 times，the change of displacement difference was 55.5 μm，while when the orthokeratology lens material parameter E increased by 3 times，the change of displacement difference was only 0.2 μm.【Conclusions】When using orthokeratology lens to correct myopia，it is necessary to fully consider the influence of corneal morphology and the mechanical properties of the cornea on the correction effect.
Keywords:
cornea； orthokeratology lens； finite element simulation； biomechanics;