Characterization of Corneal Indentation Hysteresis

descriptionPublicationkeyboard_double_arrow_right Article , Conference object 01 Aug 2015Publisher:IEEEJournal:2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

Authors: Match W. L. Ko; Dongming Wei; Christopher Kai-shun Leung;

doi: 10.1109/embc.2015.7320197

pmid: 26738097

Characterization of Corneal Indentation Hysteresis

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Abstract

Corneal indentation is adapted for the design and development of a characterization method for corneal hysteresis behavior - 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 (IOP) dependences. The CIH increased with indentation rate at lower 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 corneal tangent modulus.

Related Organizations

Chinese University of Hong Kong
China (People's Republic of)
The Chinese University of Hong kong
Hong Kong
Nazarbayev University
Kazakhstan

Keywords

Cornea, Tonometry, Ocular, Sus scrofa, Animals, Glaucoma, Keratoconus, Intraocular Pressure

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