A device comprising: an array of antenna coils (140, 470), wherein the array of antenna coils is configured to be mounted proximate a skin surface and to span a specified area of the skin surface, such that each antenna coil of the array of antenna coils has a respective degree of electromagnetic coupling with an antenna of an implanted device that is implanted beneath the skin surface, an array of light emitters, wherein the array of light emitters is configured to be mounted proximate the skin surface and to span the specified area of the skin surface when the antenna array is mounted proximate the skin surface, such that light emitted by each light emitter of the array of light emitters illuminates a respective portion of the specified area of the skin surface, a controller operably coupled to the array of antenna coils and to the array of light emitters, wherein the controller comprises a computing device programmed to perform controller operations comprising: selecting an antenna coil of the array of antenna coils, wherein selecting an antenna coil of the array of antenna coils comprises: (a) detecting a received signal strength of a radio frequency signal received by each antenna coil of the array of antenna coils, and (b) determining which antenna coil of the array of antenna coils has the greatest received signal strength; operating the selected antenna coil of the array of antenna coils to at least one of (i) provide wireless power to the implanted device, or (ii) receive a wireless transmission from the implanted device; and selecting at least one light emitter associated with the operated antenna coil proximate the at least one light emitter, and operating the selected light emitter(s) to at least one of (i) provide optical wireless power to the implanted device or (ii) provide illumination to a light sensor of the implanted device. an array of antenna coils (140, 470), wherein the array of antenna coils is configured to be mounted proximate a skin surface and to span a specified area of the skin surface, such that each antenna coil of the array of antenna coils has a respective degree of electromagnetic coupling with an antenna of an implanted device that is implanted beneath the skin surface, an array of light emitters, wherein the array of light emitters is configured to be mounted proximate the skin surface and to span the specified area of the skin surface when the antenna array is mounted proximate the skin surface, such that light emitted by each light emitter of the array of light emitters illuminates a respective portion of the specified area of the skin surface, a controller operably coupled to the array of antenna coils and to the array of light emitters, wherein the controller comprises a computing device programmed to perform controller operations comprising: selecting an antenna coil of the array of antenna coils, wherein selecting an antenna coil of the array of antenna coils comprises: (a) detecting a received signal strength of a radio frequency signal received by each antenna coil of the array of antenna coils, and (b) determining which antenna coil of the array of antenna coils has the greatest received signal strength; operating the selected antenna coil of the array of antenna coils to at least one of (i) provide wireless power to the implanted device, or (ii) receive a wireless transmission from the implanted device; and selecting at least one light emitter associated with the operated antenna coil proximate the at least one light emitter, and operating the selected light emitter(s) to at least one of (i) provide optical wireless power to the implanted device or (ii) provide illumination to a light sensor of the implanted device. selecting an antenna coil of the array of antenna coils, wherein selecting an antenna coil of the array of antenna coils comprises: (a) detecting a received signal strength of a radio frequency signal received by each antenna coil of the array of antenna coils, and (b) determining which antenna coil of the array of antenna coils has the greatest received signal strength; (a) detecting a received signal strength of a radio frequency signal received by each antenna coil of the array of antenna coils, and (b) determining which antenna coil of the array of antenna coils has the greatest received signal strength; operating the selected antenna coil of the array of antenna coils to at least one of (i) provide wireless power to the implanted device, or (ii) receive a wireless transmission from the implanted device; and (i) provide wireless power to the implanted device, or (ii) receive a wireless transmission from the implanted device; and selecting at least one light emitter associated with the operated antenna coil proximate the at least one light emitter, and operating the selected light emitter(s) to at least one of (i) provide optical wireless power to the implanted device or (ii) provide illumination to a light sensor of the implanted device. (i) provide optical wireless power to the implanted device or (ii) provide illumination to a light sensor of the implanted device.