For one, you're probably wondering what AR (Augmented Reality) even is so let me give you a brief overview of what it is:
"A technology that superimposes a computer-generated image on a user's view of the real world, thus providing a composite view." (Oxford Dictionary)
Sounds like science fiction doesn't it? Basically what these contact lenses do is give the user the ability to not only see clearly, but it also can translate languages in real-time, tag faces and remember people's names for you, as well as highlight facial expressions/non-verbal cues!