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Biomechanical Response of the Human Eye to Dynamic Loading

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dc.contributor.authorBisplinghoff, Jill Alizaen
dc.contributor.committeechairDuma, Stefan M.en
dc.contributor.committeememberStitzel, Joel D.en
dc.contributor.committeememberHardy, Warren N.en
dc.contributor.committeememberGabler, Hampton Clayen
dc.contributor.departmentBiomedical Engineeringen
dc.date.accessioned2014-03-14T20:34:11Zen
dc.date.adate2009-06-17en
dc.date.available2014-03-14T20:34:11Zen
dc.date.issued2009-04-10en
dc.date.rdate2012-04-27en
dc.date.sdate2009-04-24en
dc.description.abstractBlindness due to ocular trauma is a significant problem in the United States considering that each year approximately 500,000 years of eyesight are lost. The most likely sources of eye injuries include sports related impacts, automobile accidents, consumer products, and military combat. Out of the 1.9 million total eye injuries in the country, more than 600,000 sports injuries occur each year and 40,000 of them require emergency care. In 2007, approximately 66,000 people suffered from vehicle related eye injuries in the United States. Of the vehicle occupants sustaining an eye injury during a crash, as many as 15% to 25% sustained severe eye injuries and it was shown that within these severe eye injuries as many as 45% resulted in globe rupture. The purpose of this thesis is to characterize the biomechanical response of the human eye to dynamic loading. A number of test series were conducted with different loading conditions to gather data. A drop tower pressurization system was used to dynamically increase intraocular pressure until rupture. Results for rupture pressure, stress and strain were reported. Water streams that varied in diameter and velocity were developed using a customized pressure system to impact eyes. Intraocular pressure, normalized energy and eye injury risk were reported. A Facial and Ocular Countermeasure Safety (FOCUS) headform was used to measure the force applied to a synthetic eye during each hit from projectile shooting toys. The risk of eye injury for each impact was reported. These data provide new and significant research to the field of eye injury biomechanics to further the understanding of eye injury thresholds.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-04242009-094655en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-04242009-094655/en
dc.identifier.urihttp://hdl.handle.net/10919/31880en
dc.publisherVirginia Techen
dc.relation.haspartBisplinghoff_Thesis-R3.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectscleraen
dc.subjecteyeen
dc.subjectinjuryen
dc.subjectrisken
dc.subjectmaterialen
dc.subjectpressureen
dc.subjectpropertiesen
dc.subjectruptureen
dc.subjectstrainen
dc.subjectstressen
dc.titleBiomechanical Response of the Human Eye to Dynamic Loadingen
dc.typeThesisen
thesis.degree.disciplineBiomedical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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