Abstract
Retinal prostheses have demonstrated the capability to give blind patients the ability to detect motion and locate large objects. High-resolution retinal prostheses require precise activation of retinal cells to elicit a small visual phosphine that can serve as a building block to make patterns. Each electrode should activate only nearby cells, however patients receiving single electrode stimulation often report a streak-shaped phosphene rather than a focal spot. It is important to investigate stimulus paradigms that will provide better control over the spatial patterns of activation. During this study a 55 year old patient implanted with the Argus II system on August 2015 was tested with single electrode stimulation and pattern stimulation experiments. Tasks were performed using Argus II normal parameters.
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