alt Hacker NewsMy understanding of those is that contact lenses work the same way that multifocal glasses work, with the added disadvantage that every time you blink, it takes them a second to re-align correctly. So this should be completely different, if it works.
I tried them and could not get used to them. I went back to using single focus lenses and using mild readers (1.00 or 1.25 for desktop screen work at arm's length, and slightly stronger readers (2.00 or maybe 2.50) for very close work.
I typically have a pair of mild readers that I leave on the desk and carry a pair of the stronger ones around for reading my phone, restaurant menus, etc.
Note if you wear glasses you can "focus" them to some extent by sliding them up and down your nose.