the study's authors say it might have something to do with our desire to collect things, particularly when we are feeling unfulfilled. >> i shop all the time. what does that mean? >> you have to eat more. >> got to eat more. deal. according to the cdc, more than 1 million americans are legally blind. 12 million visually impaired. technology played a significant role in helping the blind. we are on the verge of a true game changer. >> it comes in the form of a smartphone app that allows any of us to lend a helping hand. here's abc's tech contributor tina trinh. >> with the help of her guide dog ramona, the daily commute to her office in new york city is easy. still everyday objects can pose a problem. today it's a phone that doesn't yet have braille dots inscribed on the plate. making the buttons meaningless to her. a new app called be my eyes is about to solve the problem.