[makeitdouble]

To put oil on the fire, there is the same debate about cyborgs: glasses are a mechanical enhancement of the human body, so technically…

Less controversially, hearing aids and HDR goggles would also fit the bill.

[pmontra]

Shoes, hats, many kinds of clothes are mechanical enhancements. Gloves for working without hurting one's hands, etc. All those things give a definite advantage over unprotected skin. I don't even start listing tools, which glasses are.