I know what transhumanism is, but people who are not, for example, academics in a related field calling themselves a transhumanist makes no sense to me. Like, as a transhumanist, what do you do?
Are these people just identity-hungry fans of a genre of sci-fi? Are they saying we shouldn't work to solve societal problems because technology will do it for us? Do they just watch a lot of youtube videos about it?
Great comment, I'd just add that beyond the daily technologies you mention (glasses, etc), writing and literacy are also technologies (Ong, "Writing is a Technology that Restructures Thought).
Oral speech is perhaps an edge case (is communication a technology? Perhaps, the art of rhetoric definitely is), but the fact is there is no "natural" human.