The Friend: A Novel by Sigrid Nunez:
During the 1980s, in California, a large number of Cambodian women went to their doctors with the same complaint: they could not see. The women were all war refugees. Before fleeing their homeland, they had witnessed atrocities for which the Khmer Rouge, which had been in power from 1975 to 1979, was well known. Many of the women had been raped or tortured or otherwise brutalized. Most had seen family members murdered in front of them. One woman, who never again saw her husband and three children after soldiers came and took them away, said that she had lost her sight after having cried every day for four years. She was not the only one who appeared to have cried herself blind. Others suffered from blurred or partial vision, their eyes troubled by shadows and pains.