Microcontact structure for implantation in a mammal, especially a human being

Microcontact structure according to any one of the preceding claims, characterised in that the microcontacts with the greatest surface density are arranged in a region radially spaced from the central point by about 200 μm to 1,200 μm.

Microcontact structure according to any one of the preceding claims, characterised in that the microcontacts in a second region radially spaced from the central point by more than about 1,200 μm have a lower surface density than in the first region.

Microcontact structure according to any one of the preceding claims, characterised in that the microcontacts are substantially rotationally symmetrically arranged around the central point of the microcontact structure.

Microcontact structure according to any one of the preceding claims, characterised in that the distribution of the microcontacts varies continuously in the radial direction in the first region and the second region, a surface density maximum being located in the first region and the surface density continuously decreasing radially outwardly from there.

Microcontact structure for contacting nerve tissue of the visual cortex for a vision prosthesis in mammals or human beings, characterised in that the surface density of the microcontacts is not constant over the surface of the microcontact structure.

Microcontact structure according to any one of the preceding claims, characterised in that the microcontacts are arranged in a region substantially adapted to the retinotopic projection of the central visual field, the surface density of the microcontacts having a maximum in the region of projection of the fovea.

Microcontact structure according to any one of the preceding claims, characterised in that the contacted region corresponds to the form of the visual cortex.

Microcontact structure according to any one of the preceding claims, characterised in that the surface density of the microcontacts decreases continuously, starting from the region associated with the fovea, in the direction of increasing eccentricity.

Microcontact structure according to any one of the preceding claims, characterised in that the surface density in the direction depicting the horizontal plane of the natural visual field is higher with the same eccentricity than in the regions depicting top and bottom in the natural visual field.