The thing is, contact-lens companies – with the help of the U.S. military and various computer manufacturers – have been working on an augmented reality alternative: contact lenses with embedded computer heads-up-displays, which can also change the focus of what the wearer sees.
Smart contact lenses aren't going to do anything about vision problems in the third world. But they will do quite a lot for the bulk of eyeglass wearers – making them as dangerous and inattentive while walking and web browsing as they are now texting and driving.
In the face of that kind of leap in vision-enhancement technology, you have to wonder how many people will be satisfied simply being able to see clearly.
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