This post was first published on 4th September, 2014. A cane, as I had mentioned in one of my earlier posts, is a blind person's lifeline. It allows a person to make his way around by means of touch from a distance. The length of the cane may vary based on a person's height, and on an average, it allows a blind person to feel for objects up to about a distance of 1.2 metres. Traditional canes operate completely on the basis…