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In vivo biocompatibility tests performed on a polyimide (PI2525) microelectrode array (3 × 3 mm, 18 µm thick polyimide support) for retinal stimulation: (a) fixed polyimide-based array at 12 weeks after implantation in rabbit eyes; (b) free-floating polyimide-based array at 12 weeks after implantation in rabbit eyes. Adapted from [47], with permission from © 2004 Elsevier.
