James Yoo at the Institute of Regenerative Medicine at Wake Forest University uses a standard inkjet printing mechanism to create layers of viable cells, which can then be built into 3D structures with different kinds of cells.

Michelle Hauer at the University of Southern California has come up with a camera design small enough to be implanted within the lens of the eye, and takes into account the effect of the cornea on incoming light.

The device transmits images to a chip at the back of the eye, which passes the image signals on to the nerve cells.