Contact-based stiffness sensing of human eye
| Autor: | H.K. Mishima, R. Kempf, Hidetoshi Tsukamoto, Yoshichika Iida, S. Katakura, Eiichiro Sugimoto, J. Okude, Yuichi Kurita, K. Kobayashi, Yoshiaki Kiuchi, Makoto Kaneko |
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| Rok vydání: | 2008 |
| Předmět: |
Applanation tonometry
Intraocular pressure animal structures genetic structures Biomedical Engineering Glaucoma Models Biological Sensitivity and Specificity Goldmann applanation tonometry Cornea Tonometry Ocular medicine Humans Computer Simulation Diagnosis Computer-Assisted Intraocular Pressure business.industry technology industry and agriculture Biomechanics Stiffness Reproducibility of Results medicine.disease eye diseases Elasticity medicine.anatomical_structure Optometry Human eye sense organs Stress Mechanical medicine.symptom business Biomedical engineering |
| Zdroj: | IEEE transactions on bio-medical engineering. 55(2 Pt 1) |
| ISSN: | 1558-2531 |
| Popis: | Goldmann applanation tonometry is commonly used for measuring intraocular pressure (IOP) to diagnose glaucoma. However, the measured IOP by conventional applanation tonometry is valid only under the assumption that all subjects have the same structural eye stiffness. This paper challenges in vivo measurement of eye stiffness with a noninvasive approach and investigates individual differences of eye stiffness. Eye stiffness is defined by the applied force and displacement of the cornea. The displacement is detected based on captured images by a high resolution camera. The experimental results show that the measured stiffness nicely matches the analytical result that is derived from a simple spherical deformation model with an internal pressure. However, some subjects have different eye stiffness even with the same IOP. IOP with abnormal stiffness may be over/underestimated by conventional applanation tonometry. The proposed eye stiffness measurement can help detect the misestimated eye and it contributes to the early detection of glaucoma. |
| Databáze: | OpenAIRE |
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