Nagasaki Prefecture in southern Japan has many islands, and there are health disparities with urban areas. Doctors there addressed this by offering remote examinations of rheumatoid arthritis in islanders. A patient's hand held in front of cameras at an island hospital is seen as a 3D hologram by a doctor in the city. Eye doctors in Japan are detecting early-stage cataracts in poor countries to prevent blindness. A smartphone device lets them examine patients remotely in areas with few doctors.