Estimation of the surface tension of ocular cornea

Xueyong Zhang; Jianguo Ma; Rongsheng Lu; Ruixue Xia

doi:10.1117/12.819629

31 December 2008 Estimation of the surface tension of ocular cornea

Xueyong Zhang, Jianguo Ma, Rongsheng Lu, Ruixue Xia

Proceedings Volume 7130, Fourth International Symposium on Precision Mechanical Measurements; 71302H (2008) https://doi.org/10.1117/12.819629
Event: Fourth International Symposium on Precision Mechanical Measurements, 2008, Anhui, China

Abstract

Considering the potential clinical importance, the surface tension of ocular cornea under the action of normal physiological intraocular pressure is estimated, and a novel technique and a simple mechanical model for determining the tension are also presented in this paper. An instrument embodying mainly a CCD camera, an optical staff gauge and a manometer was developed primarily to measure both the surface point displacement and intraocular pressure of the cornea. A simple theoretical model was used to characterize the tensions of the ocular corneas under the action of the intraocular pressure. Due to the difficulty in obtaining the human cornea, laboratory experiments were carried out on porcine cornea specimens. The thickness of the specimens was accurately measured by optical coherence tomography. The matrix and collagen properties within the corneal tissue were manifested in the experiment. Experimental results on porcine corneas showed that the present technique is applicable to estimate the surface tension. In the normal physiological intraocular pressure range, both meridian and circumference tensions of the porcine corneas along the radial coordinate distribute are not uniform.

Citation Download Citation

Xueyong Zhang, Jianguo Ma, Rongsheng Lu, and Ruixue Xia "Estimation of the surface tension of ocular cornea", Proc. SPIE 7130, Fourth International Symposium on Precision Mechanical Measurements, 71302H (31 December 2008); https://doi.org/10.1117/12.819629

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