Eye tracking and analysis of the human eye is one of the perspective technologies. It can substantially improve our interaction with our smartphones. If you are reading this you probably have your opinion already. The real question is whether the precision is sufficient – thus how precise it can actually get. Assumptions Eye Before we can reason about the precision, let’s first establish some facts/assumptions that we will consider. Eye is a strange natural camera, that has evolved somewhere around 500 million years ago. By analyzing the eye we understand detecting the different elements, the most important is the iris....