Obstacles that a cane may not detect

Students should be aware that the cane cannot always protect them from

1. overhanging obstacles, such as tree branches and protruding signs;
2. objects and holes that are small or low enough that the cane can go around them; and
3. poles and corners that the cane tip can go around. The shaft of the cane will, however, contact these objects if they are close enough to where the hand holding the cane is approaching, which means that the head is protected if the hand is centered in front of the body.

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