By Shari HawkinsSpecial to The OklahomanLeah Campbell remembers the day she lost her vision. She was a sixth grader, in her bedroom one morning in Altus, when she heard her mother walk in. “Will you please turn on the lights?” Leah, then 11, asked. “They are on,” said her mother. It would take 17 years before Leah and her family would learn what had caused her blindness.Read more on NewsOK.com