11.   Similar procedures could regenerate skin for burn patients, immune cells for people with HIV, retinal cells for blind people or muscle cells to combat muscular dystrophy.

12.   The virus can be injected into the fluid-filled compartment behind the retina, where it will infect retinal cells.

13.   The retinal cells, which normally are fixed in layers of the retina in the back of the eye, cling to the beads for stability.