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    An update on retinal prostheses

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    Author
    Ayton, LN; Barnes, N; Dagnelie, G; Fujikado, T; Goetz, G; Hornig, R; Jones, BW; Muqit, MMK; Rathbun, DL; Stingl, K; ...
    Date
    2020-06-01
    Source Title
    Clinical Neurophysiology
    Publisher
    ELSEVIER IRELAND LTD
    University of Melbourne Author/s
    Ayton, Lauren; Petoe, Matthew; Barnes, Nicholas
    Affiliation
    Optometry and Vision Sciences
    Medical Bionics
    Pharmacology and Therapeutics
    Metadata
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    Document Type
    Journal Article
    Citations
    Ayton, L. N., Barnes, N., Dagnelie, G., Fujikado, T., Goetz, G., Hornig, R., Jones, B. W., Muqit, M. M. K., Rathbun, D. L., Stingl, K., Weiland, J. D. & Petoe, M. A. (2020). An update on retinal prostheses. CLINICAL NEUROPHYSIOLOGY, 131 (6), pp.1383-1398. https://doi.org/10.1016/j.clinph.2019.11.029.
    Access Status
    Access this item via the Open Access location
    URI
    http://hdl.handle.net/11343/253961
    DOI
    10.1016/j.clinph.2019.11.029
    Open Access URL
    https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7198351
    Abstract
    Retinal prostheses are designed to restore a basic sense of sight to people with profound vision loss. They require a relatively intact posterior visual pathway (optic nerve, lateral geniculate nucleus and visual cortex). Retinal implants are options for people with severe stages of retinal degenerative disease such as retinitis pigmentosa and age-related macular degeneration. There have now been three regulatory-approved retinal prostheses. Over five hundred patients have been implanted globally over the past 15 years. Devices generally provide an improved ability to localize high-contrast objects, navigate, and perform basic orientation tasks. Adverse events have included conjunctival erosion, retinal detachment, loss of light perception, and the need for revision surgery, but are rare. There are also specific device risks, including overstimulation (which could cause damage to the retina) or delamination of implanted components, but these are very unlikely. Current challenges include how to improve visual acuity, enlarge the field-of-view, and reduce a complex visual scene to its most salient components through image processing. This review encompasses the work of over 40 individual research groups who have built devices, developed stimulation strategies, or investigated the basic physiology underpinning retinal prostheses. Current technologies are summarized, along with future challenges that face the field.

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