I have implants, and they give great distance vision. Those plastic lenses do not change focus, so closeup work requires a pair of glasses for each working distance. Assume you put on glasses in order to see a lathe's cutter on the work. Now you can't see the feed dials. Put on glasses for the feed dials, now you can't see the cutter.
This is very frustrating. I used to have a great retirement pass-time.