Obituary: Advocate helped children with visual and hearing impairments

As director of international programs for the Perkins School for the Blind until his death May 16, special-educator Michael T. Collins, 60, spent nearly 30 years helping more than 10,000 children around the world who could not see or hear. "Mr. Collins contributed more systematically to this field than anyone else in the world," said the school's president. The Boston Globe