Fig. 3 |. Implantable photonic healthcare devices.

The essential components include micro light-emitting diodes μLEDs) and their stretchable arrays (part a), flexible and stretchable antennas for wireless power and communication (part b) and stretchable interconnections between the components (part c). Photonic healthcare devices can be used for different applications, including health monitoring and photodynamic and optogenetic therapies (part d). IOP, intraocular pressure. Part a is adapted from REF.¹²⁹, Springer Nature Limited, and with permission from REF.¹⁰⁹, Elsevier. Part b is adapted from REF.²¹, Springer Nature Limited, and with permission from REF.²², Elsevier. Part c is adapted from REF.¹²⁹, Springer Nature Limited and with permission from REF.¹⁴², AAAS.