Retinoblastoma is a deadly eye cancer that develops in children, and because the disease is so difficult to detect it often ends up stealing the sense of sight from its young victims. However, one of the easiest ways to determine whether or not someone is suffering from the disease is through the use of a smartphone—and you don't even need an app.

I only had three days with Samsung's latest flagship phone, the Galaxy S4. That's not nearly enough time for me to do a proper review, so instead consider this a preview and commentary on my very fleeting flirtation with a good (but not earth-shaking) phone.