Let's say that you're the type of person that has to have the latest and greatest all the time. Popular clothes, trendy footwear, belts matching, the whole nine... Would you go as far as color changing contacts if you could? Especially if they had the easy and intuitive controls through an app on your smartphone?

While the idea is novel and futuristic, somewhat narcissistic and stupid, app enabled contacts aren't a thing... yet. However, there are eye drops you can purchase to gradually change the color of your eyes. There are several companies producing and selling these products, though, they aren't regulated at all. They work by chemically altering your eyeballs, and believe it or not, it's popular around the world.