Aural & retinal implants

Platinum and iridium are used in aural implants that electrically stimulate the auditory nerve to replace damaged or malfunctioning cochleas in those suffering from deafness. The electrical conductivity, durability, biological compatibility and oxidation resistance of these PGMs make them perfect for the electrodes in the implants. Likewise, platinum and iridium can be found in retinal implants to improve damaged or deteriorating eyesight.