Retinal Prosthesis Dissertation - Student Home Pages

the order of 1µm/2.5µm, and the foveal area (2.66mm 2 ) in which the preponderance
of colour sensitive fibres exist. Beyond the foveal area the positioning of electrodes
to interface with colour sensitive RGCs would be very onerous for little extra value
in terms of retinal prosthesis capability. In any case the camera approach in its
present form would also have a limit of a 1024 by 1024 image i.e. 1048576 pixels as
beyond that size there is no longer a one to one correspondence between cones and
ganglion axons via bipolar cells. What is being said here is that beyond that one-toone
correspondence horizontal cells and amacrine cells exert their influence to give
convergence of the receptive fields to the ganglion cells. [205]
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