Mobile phones make you go blind in supermarkets.

Mobile phones are now being a major cause on market economy, and your eye sight.
as you are waiting down the isle to pay for your groceries in the supermarket you avoid magazine ads, gum candy, and other goods.
It is known the cause to be Facebook and Other social media sites.

The problem has worsened in the past 18 months, as more than half of all Americans now carry a smart phone, which is making the human being  "dumber"