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The entire field of orientation and mobility (O&M) exists because of the dog guide and, later, the long cane. Both were developed in response to war. Dog guides emerged after World War I, and the long cane after World War II, to serve newly blinded veterans—adults who had walked confidently with vision for decades before losing it. As a result, the curriculum for teaching independent travel was designed around a very specific learner: a physically fit, cognitively intact adul

History of O&M describes the long, slow, tortured road of retro-fitting adult long canes and O&M methods for children.