Summary:Tibet has the largest number of untreated cataract cases of any nation in the world, due in part to the intense sunshine common in the country's high altitudes, the widespread poverty of the nation, and a lack of proper medical training and equipment. Marc Lieberman is an American ophthalmologist who decided something needed to be done about the growing blindness in Tibet and created the Tibet Vision Project, a humanitarian effort designed to bring the equipment and medicines necessary to treat cataracts to needy Tibetans, as well as training Tibetan doctors how to effectively treat common eye ailments. American filmmaker Isaac Solotaroff followed Lieberman and his associates on one of their visits to Tibet, and the result was the documentary Visioning Tibet, which tells the story of Lieberman and his work, as well as the challenges of bringing modern medical care to a poor and politically unstable country.