Sioux Falls Rehabilitation Center for the Blind student, Trenton Rowland, 28, of Sheridan, Wyo., who has retinitis pigmentosa--a degenerative eye disease that causes severe vision impairment and often blindness--and Bob Smith, an orientation and mobility and home mechanics and creative arts instructor at the Rehabilitation Center, work on a table in the wood shop on Thursday, April 10, 2014, at the South Dakota Rehabilitation Center for the Blind in Sioux Falls. (Joe Ahlquist / Argus Leader)