Lend Me Your Eyes
A new app is helping blind people solve everyday problems by combining smartphones video technology and an army of armchair volunteers.
World Hacks investigates how it works and explores whether micro-volunteering projects like this have the potential to solve all kinds of problems in the future.
Presented by Mukul Devichand.
Image caption: Vicky, who is blind, using an app to help her sew / Image credit: BBC