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While we properly emphasize, for psychologic reasons, the similarity of blind people and their problems to other people and to other people's problems, we all know that blindness requires special adjustments and techniques. Learning foot travel is one of the more compelling adjustments.
The cane which enables a blind person to touch the precise spot where his foot will follow is the most popular aid. It fulfills Justice Holmes' edict in another context that no man should put his foot down unless he knows that ground is under it. But the cane has its disadvantages. It forces the individual to reveal his blindness to the world. It requires, to be maximally effective, a special kind of learning in diplomacy as well as in method.
The modern cane made of light metal was developed in the Army Hospital during World War II and, together with a training program, continues to be
Hoover RE. Mobility for the Blind. Arch Ophthalmol. 1966;75(6):739. doi:10.1001/archopht.1966.00970050741002