[yencabulator]

Most artificial lenses, especially more than 5 years back, had a single focal point and did not adjust. You chose to either have near vision (mostly carless old people), far vision (and still use reading glasses), or blended vision (one eye far one near).

The flexible lens stuff is still relatively new and there are reports of them sort of being like 80% focused 100% of the time, which can suck. Apparently lots of individual variability in results, where as the single-focus lenses are 60s technology and well figured out.