Yes... It would take several thousands of electrodes to connect to different nerves and stimulate them to see objects in a game.. So that would bring us straight to some type of wireless connection...
Most or all present-day medical electrode systems intended to be permanently (“chronically”) implanted, such as the previously mentioned Argus II and the Braingate (not a vision, but a prosthetic control, system) use a wireless connection. This is because it’s difficult to avoid injury, infection, and wear-and-tear with wires piercing the skin (“percutaneous”). It’s a pretty mature technology, because one of the major challenges with implanted wireless devices, powering or charging batteries in the implanted part of the system, were solved many years ago for implanted heart pacemakers
So the connection problem for implanted electrodes is pretty well solved. The major remaining problems for a system with many times more electrodes than present-day systems are miniaturization, and how to place them. Presently, placing electrodes in the brain, eye, or other nerves requires surgery.
I think electromagnet should read/writte.
I wonder if electromagnetism can stimulate the nerves and neuron's to be able to see and hear.
In short, magnetic fields can’t effect nerves like this. For a longer explanation, see this post