Development of a method to measure upper eyelid pressure on the cornea [Abstract]
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 [Abstract]. In 12th Scientific Meeting in Optometry, 28–30 September 2008, University of Auckland.
Purpose: The cornea is known to be susceptible to forces exerted by eyelids. There have been previous attempts to quantify eyelid pressure however 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.-----
Method: 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.-----
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 stabilize 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 evenly apply pressure to the sensor when attached to the contact lens so the raw digital output could be converted to actual pressure units.-----
Conclusions: A number of 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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|Item Type:||Conference Item (Presentation)|
|Additional Information:||ABSTRACTS 12th Scientific Meeting in Optometry The University of Auckland, 28–30 September 2008. Self-archiving of the author-version in institutional repositories is not currently supported by this publisher. For more information, please refer to the journal's website (see hypertext link) or contact the author.|
|Keywords:||eyelid pressure, piezoresistive sensors, measurement|
|Subjects:||Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Optometry and Ophthalmology not elsewhere classified (111399)
|Divisions:||Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Optometry & Vision Science
|Copyright Owner:||Copyright 2009 John Wiley and Sons|
|Deposited On:||03 Feb 2009 01:45|
|Last Modified:||21 Apr 2010 16:48|
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