From passive to active subretinal implants, serving as adapting electronic substitution of degenerated photoreceptors. - Eberhart Zrenner; V. P. Gabel; Florian Gekeler; R. G. Graf; H. Gruber; H. Hammerle; K. Kohler; W. Nisch; Helmut Sachs; H. Sailer; K. Shinoda; Alfred Stett; et al. (IJCNN, 2004)