Development of a Magnetic Attachment Method for Bionic Eye Applications

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dc.contributor.authorFox, Kate
dc.contributor.authorMeffin, Hamish
dc.contributor.authorBurns, Owen
dc.contributor.authorAbbott, Carla
dc.contributor.authorAllen, Penelope
dc.contributor.authorOpie, Nicholas
dc.contributor.authorMcGowan, Ceara
dc.contributor.authorYeoh, Jonathon
dc.contributor.authorAhnood, Arman
dc.contributor.authorLuu, Chi
dc.contributor.authorCicione, Rosemary
dc.contributor.authorSaudners, Alexia
dc.contributor.authorMcPhedran, Michelle
dc.contributor.authorCardamone, Lisa
dc.contributor.authorVillalobos, Joel
dc.contributor.authorGarrett, David
dc.contributor.authorNayagam, David
dc.contributor.authorApollo, Nicholas
dc.contributor.authorGanesan, Kumaravelu
dc.contributor.authorShivdasani, Mohit
dc.contributor.authorStacey, Alastair
dc.contributor.authorEscudie, Mathilde
dc.contributor.authorLichter, Samantha
dc.contributor.authorShepherd, Robert
dc.contributor.authorPrawer, Stephen
dc.date.accessioned2018-02-12T23:10:24Z
dc.date.available2018-02-12T23:10:24Z
dc.date.issued2016
dc.description.abstractSuccessful visual prostheses require stable, long-term attachment. Epiretinal prostheses, in particular, require attachment methods to fix the prosthesis onto the retina. The most common method is fixation with a retinal tack; however, tacks cause retinal trauma, and surgical proficiency is important to ensure optimal placement of the prosthesis near the macula. Accordingly, alternate attachment methods are required. In this study, we detail a novel method of magnetic attachment for an epiretinal prosthesis using two prostheses components positioned on opposing sides of the retina. The magnetic attachment technique was piloted in a feline animal model (chronic, nonrecovery implantation). We also detail a new method to reliably control the magnet coupling force using heat. It was found that the force exerted upon the tissue that separates the two components could be minimized as the measured force is proportionately smaller at the working distance. We thus detail, for the first time, a surgical method using customized magnets to position and affix an epiretinal prosthesis on the retina. The position of the epiretinal prosthesis is reliable, and its location on the retina is accurately controlled by the placement of a secondary magnet in the suprachoroidal location. The electrode position above the retina is less than 50 microns at the center of the device, although there were pressure points seen at the two edges due to curvature misalignment. The degree of retinal compression found in this study was unacceptably high; nevertheless, the normal structure of the retina remained intact under the electrodes.en_US
dc.description.sponsorshipThis research was supported by the Australian Research Council (ARC) through its Special Research Initiative (SRI) in Bionic Vision Science and Technology grant to Bionic Vision Australia (BVA). CERA receives Operational Infrastructure Support from the Victorian Government and is supported by a NHMRC Centre for Clinical Research Excellence Award (#529923). The Bionics Institute acknowledges the support received from the Victorian Government through its Operational Infrastructure Program.en_US
dc.identifier.citationFox, K., H. Meffin, O. Burns, C. J. Abbott, P. J. Allen, N. L. Opie, C. McGowan, J. Yeoh, A. Ahnood, C. D. Luu, R. Cicione, A. L. Saunders, M. McPhedran, L. Cardamone, J. Villalobos, D. J. Garrett, D. A. Nayagam, N. V. Apollo, K. Ganesan, M. N. Shivdasani, A. Stacey, M. Escudie, S. Lichter, R. K. Shepherd, and S. Prawer. 2016. Development of a Magnetic Attachment Method for Bionic Eye Applications. Artificial Organs. 40(3): E12-24.en_US
dc.identifier.issn1525-1594 (Electronic) 0160-564X (Linking)
dc.identifier.urihttp://repository.bionicsinstitute.org:8080/handle/123456789/283
dc.language.isoenen_US
dc.publisherWiley Periodicals, Inc.en_US
dc.subjectMagneten_US
dc.subjectBionic eyeen_US
dc.subjectAttachmenten_US
dc.subjectRetinaen_US
dc.titleDevelopment of a Magnetic Attachment Method for Bionic Eye Applicationsen_US
dc.typeArticleen_US
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