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Proceedings Paper

A new contrastive method for measuring surface tension of the human cornea in vivo
Author(s): Jianguo Ma; Xueyong Zhang
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Paper Abstract

A new contrastive method to measure the surface tension of the human cornea in vivo is introduced. Analyzing pressure-volume relationships and conditions of force equilibriums during the indention and applanation tonometry, the relationship of the intraocular pressure value and the change of the intraocular volume measured in the applanation tonometry as a function of the difference in the intraocular pressure between the indention and applanation tonometer readings, which was derived, the coefficient of surface tension for the human cornea was further obtained using this relationship and the difference also relative to the coefficient was considered to be the contribution of the surface tension of the human cornea. Laboratory experiments were carried out on a stimulated eyeball connected to a hydraulic manometer to accomplish the intraocular pressure at different levels. The stimulated eyeball at a chosen intraocular pressure level was measured with Schiotz indention tonometry, followed, according to the same change of intraocular volume, by Ma applanation tonometry. Preliminary experimental results showed the coefficient of the surface tension for the cornea agreed with the value calculated. This contrastive method may therefore be used to determine the coefficient of the surface tension for the human cornea and to estimate the surface tension of the human cornea in vivo. Further study including clinical trials and application is required to evaluate the usefulness and accuracy of this method.

Paper Details

Date Published: 13 October 2006
PDF: 6 pages
Proc. SPIE 6280, Third International Symposium on Precision Mechanical Measurements, 62803N (13 October 2006); doi: 10.1117/12.716322
Show Author Affiliations
Jianguo Ma, Anhui Institute of Architecture and Industry (China)
Xueyong Zhang, Anhui Institute of Architecture and Industry (China)


Published in SPIE Proceedings Vol. 6280:
Third International Symposium on Precision Mechanical Measurements
Kuang-Chao Fan; Wei Gao; Xiaofen Yu; Wenhao Huang; Penghao Hu, Editor(s)

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