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Development of a method to measure upper eyelid pressure on the cornea

Shaw, Alyra J., Collins, Michael J., Davis, Brett A., & Carney, Leo G. (2009) Development of a method to measure upper eyelid pressure on the cornea. In Proceedings of the 12 Biennial Scientific and Educators' Meeting in Optometry, Optometrists Association Australia, University of Auckland, Auckland.

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Abstract

Purpose: The cornea is known to be susceptible to forces exerted by eyelids. There have been previous attempts to quantify eyelid pressure but the reliability of the results is unclear. The purpose of this study was to develop a technique using piezoresistive pressure sensors to measure upper eyelid pressure on the cornea. Methods: The technique was based on the use of thin (0.18 mm) tactile piezoresistive pressure sensors, which generate a signal related to the applied pressure. A range of factors that influence the response of this pressure sensor were investigated along with the optimal method of placing the sensor in the eye. Results: Curvature of the pressure sensor was found to impart force, so the sensor needed to remain flat during measurements. A large rigid contact lens was designed to have a flat region to which the sensor was attached. To stabilise the contact lens during measurement, an apparatus was designed to hold and position the sensor and contact lens combination on the eye. A calibration system was designed to apply even pressure to the sensor when attached to the contact lens, so the raw digital output could be converted to actual pressure units. Conclusions: Several novel procedures were developed to use tactile sensors to measure eyelid pressure. The quantification of eyelid pressure has a number of applications including eyelid reconstructive surgery and the design of soft and rigid contact lenses.

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ID Code: 31475
Item Type: Conference Paper
Additional Information: The abstract of this paper was published in "Clinical and Experimental Optometry", Vol. 92, no. 1, pp.51-69. [please see DOI].
DOI: 10.1111/j.1444-0938.2008.00341.x
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Optometry & Vision Science
Deposited On: 25 Mar 2010 07:52
Last Modified: 22 Apr 2010 02:39

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