RE Augmentation is a violation of AMA guidelines; doctors who do it risk losing their license, and therefore the legal right to practice medicine.

Mayhap, but if it's only a guideline, it does not have the force of law, and it would only apply in the US.

In past I've gotten prescription lenses which were well beyond my appropriate prescription (ie, augmented vision), so augmentation is a matter of interpretation and opinion.

So the earlier comment that "it is against the law to give it [eg, retinal or cochlear implant] capabilities that normal humans don't have" is overstating the situation.

The Brits have been trying out lens implants (following removal of cataracts) which have the advantage of being 'tunable' with a laser following surgery, thereby providing perfect (if not augmented) vision at the flick of a switch. I'm waiting for those to hit North America.