What procedure must be explained for using the cane effectively?

Using a cane effectively is fundamental for individuals with visual impairments to navigate their environment safely. The procedure that involves contacting objects and locating drop-offs is crucial because it directly relates to how a person with a cane interacts with their surroundings.

When using a cane, the technique of making contact with objects allows the user to gather vital information about their environment. The cane can help detect curbs, steps, or other obstacles by tapping or dragging it along the ground. This tactile feedback is essential for understanding the immediate area and ensuring safe movement.

Additionally, locating drop-offs, such as stairs or sudden changes in surface levels, helps prevent falls. The user learns to recognize variation in the sounds or textures below the cane, which aids in navigating complex environments safely. This aspect of cane use emphasizes the importance of spatial awareness, making it a foundational skill for effective mobility.

In contrast, other options like determining the distance of obstacles, calculating elevation changes, and predicting movements of people, while relevant to mobility, do not directly encompass the immediate practical skills involved in cane usage as effectively as contacting objects and locating drop-offs.