Factors Influencing Lid Pressure on the Cornea

Collins, Michael J., Buehren, Tobias F., Trevor, Tasha, Statham, Michael, Hansen, Jacinta, & Cavanagh, Damien A. (2006) Factors Influencing Lid Pressure on the Cornea. Eye and Contact Lens, 32(4), pp. 168-173.


PURPOSE: To investigate the effects of eyelid pressure on corneal topography in different angles of gaze and under different eye movement conditions. METHODS: Ten young subjects with healthy eyes were recruited for the study. Corneal topography of the right eye was measured with a videokeratoscope before and after four 15-minute visual tasks (downward gaze of 25 degrees or 45 degrees, both with no eye movements or 1 Hz eye movements). The four tasks were conducted on four separate mornings. RESULTS.: All subjects showed significant regions of topographic change after each of the four tasks. In general, eye movements were found to cause greater topographic changes than tasks without eye movements, and the larger angle of downward gaze led to greater changes in topography. The topographic changes were located close to the lid margin position during each task. CONCLUSIONS: The pressure exerted by the eyelid is capable of altering corneal topography. These changes are enhanced when the eye looks downward and when the eye moves laterally.

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ID Code: 12117
Item Type: Journal Article
Refereed: Yes
Additional Information: Self-archiving of the author-version is not yet supported by this publisher.
For more information, please refer to the journal’s website (see hypertext link) or contact the author.
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Keywords: Angle of gaze—Corneal topography—Eye movement—, Lid force—Videokeratoscope
ISSN: 1542-233X
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) > Vision Science (111303)
Divisions: Past > Research Centres > Centre for Health Research
Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2006 Lippincott, Williams & Wilkins
Deposited On: 21 Jan 2008 00:00
Last Modified: 29 Feb 2012 13:23

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