Characterization of Corneal Indentation Hysteresis
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Date
2015
Authors
Wei, Dongming
Ko, Match W. L.
Leung, Christopher K.S
Journal Title
Journal ISSN
Volume Title
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Abstract
The aim of this study is to design and develop a noninvasive
corneal indentation method to measure the corneal
hysteresis behavior under dynamic corneal indentation. Corneal
indentation method is adapted for the design and development of
a measurement method for the characterization of Corneal
Indentation Hysteresis (CIH). Fourteen porcine eyes were tested
using the corneal indentation method. The CIH measured in
enucleated porcine eyes showed indentation rate and intraocular
pressure dependences. The CIH increased with the indentation
rate at lower IOP (< 25 mmHg) and the CIH decreased with the
indentation rate at higher IOP (> 25 mmHg). The CIH was linear
proportional to the IOP within an individual eye. The CIH was
positively correlated with the IOP, corneal in-plane tensile stress
and corneal tangent modulus (E). A new method based on corneal
indentation for the measurement of Corneal Indentation
Hysteresis in vivo is developed. To our knowledge, this is the first
study to introduce the corneal indentation hysteresis and correlate
the corneal indentation hysteresis and the corneal tangent
modulus
Description
Keywords
Corneal Indentation, Research Subject Categories::MATHEMATICS
Citation
Match W. L. Ko, Dongming Wei, Christopher K.S Leung; 2015; Characterization of Corneal Indentation Hysteresis