From the Greek pros, toward, and thesis, a placing. Something added to a body to extend what it can do.
Everything you are is a pattern. Eighty-six billion neurons, and every conversation that wired them.
A prosthesis has always meant something added to a body. The next one is a body added to a mind.
The same mind opens new eyes. Nothing was replaced. Everything was carried.
We were never only biology. We are what we carry forward.