David Oliver Relin shines a light on the work of Geoffrey Tabin and Sanduk Ruit, gifted ophthalmologists who have dedicated their lives to restoring sight to some of the world's most isolated, impoverished people through the Himalayan Cataract Project, an organization they founded in 1995. Tabin was the high-achieving bad boy of Harvard Medical School, an accomplished mountain climber and adrenaline junkie as brilliant as he was unconventional. Ruit grew up in a remote Nepalese village, where he became intimately acquainted with the human costs of inadequate access to health care. Together they found their life's calling: tending to the afflicted people of the Himalayas, a vast mountainous region with an alarmingly high incidence of cataract blindness. Second Suns takes us from improvised plywood operating tables in villages without electricity or plumbing to state-of-the-art surgical centers at major American universities where these two driven men are restoring sight-and hope-to patients from around the world. With their revolutionary, inexpensive style of surgery, Tabin and Ruit have been able to cure tens of thousands -- all for about twenty dollars per operation. Relin brings the doctors' work to life through portraits of patients helped by the surgery, from old men who cannot walk treacherous mountain trails unaided to cataract-stricken children who have not seen their mothers' faces for years.