After nearly a decade of development and public prototypes, the Mizaru company is ready to unveil the cybereye. A fully cybernetic eye that provides its user/host with high definition vision, enhanced zoom for the more expensive models, and ability to take photos with a special blink.
Originally the cybereye was for the visual impaired or amputees who lost their vision in an unfortunate accident, but now the market has opened to people with rather poor vision wanting a permanent fix, the rich and vain wanting different eye colors or patterns in their eyes.
But Mizaru has run into a problem: what could be a small and compact power source for the cybereye that isn't intrusive (by intrusive I mean further surgery) preferably it would be within the eye socket.
Near future tech. Fusion is available however I don't know how effectively nuclear can be miniaturized.