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A theoretical model of the cornea as a thin shell of variable thickness in relation to radial keratotomy

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dc.contributor.authorWilliams, Sharon Leeen
dc.contributor.departmentEngineering Mechanicsen
dc.date.accessioned2019-01-31T18:55:59Zen
dc.date.available2019-01-31T18:55:59Zen
dc.date.issued1984en
dc.description.abstractA theoretical study of the deformation fields of the cornea under internal pressure is presented. The general elasticity equations describing a thin shell of variable thickness are solved using finite difference techniques. To gain insight into the natural corneal structure, the constant thickness case is compared to one of normal thickness. The bending stresses are found to influence the cornea's natural curvature. In the third case, the normal thickness is increased 10% to model the edematous state resulting from the incisions made during radial keratotomy. A comparison of the third case reveals the increased thickness in the peripheral cornea makes a minor contribution to the displacement; but moreover, the curvature change is opposite to that desired from radial keratotomy. The incisions are necessary to weaken the lateral support of the shell allowing the displacement and change in curvature which corrects myopia.en
dc.description.degreeMaster of Scienceen
dc.format.extentvii, 87 leavesen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/10919/87288en
dc.language.isoen_USen
dc.publisherVirginia Polytechnic Institute and State Universityen
dc.relation.isformatofOCLC# 11479536en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1984.W536en
dc.subject.lcshKeratotomy, Radialen
dc.subject.lcshCornea -- Mathematical modelsen
dc.titleA theoretical model of the cornea as a thin shell of variable thickness in relation to radial keratotomyen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineEngineering Mechanicsen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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