Final answer:
Decline in depth perception can make steps or street curbs difficult to manage for older adults.
Step-by-step explanation:
As people age, there are several changes that can affect their vision, making steps or street curbs difficult to manage. One of these changes is a decline in depth perception. Depth perception is the ability to judge the distance between objects, and when it declines, it can make it harder for older adults to accurately perceive steps or curbs. This can increase the risk of falls and accidents.