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    New wide-field, dual-array, suprachoroidal-transretinal stimulation prosthesis demonstrates surgical feasibility

    New STS prosthesis shows activation of retinal neurons and optic nerve axons in animals

    Take-home message: Prof. Fujikado presents his research, which demonstrated the surgical feasibility and safety of a newly developed, dual-array, suprachoroidal-transretinal stimulation prosthesis in animals. The dual-array design was able to activate retinal neurons and optic nerve axons. Findings indicate the future possibility of activating of a larger visual field with the prosthesis.


    The focus of my research is the application of visual science in the field of ophthalmology, especially visual rehabilitation using artificial vision. Recently, we conducted an animal study into a new retinal prosthesis designed to restore sight in patients who are blind as a consequence of advanced retinitis pigmentosa (RP). This is the first step towards elucidating its feasibilty in humans.

    Acheiving artificial vision

    Generally speaking, a retinal prosthesis creates an artificial vision named phophene by electrically stimulating the residual retinal neurons in blind patients. There are three key approaches to achieving this: one is via the use of an epiretinal prosthesis in which electrodes are placed directly on the retina, the second one is the subretinal prosthesis in which electrodes are placed beneath the retina, and the third one is the suprachoroidal-transretinal prosthesis (STS) in which electrodes are placed in the suprachoroidal space or in the scleral pocket.

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