Thanks for the info. I don't know what you're saying in that last paragraph, but I do appreciate your professional opinion.
Google is your friend, or at least duck duck go or some other search engine,
Lens exchange is where we take out the natural lens and place an artificial lens, we do these in some folks who want to be glasses free but are too old for lasik or have cataracts starting to form. A lens exchange is the same exact surgery as cataract surgery but we do this before cataracts are covered under insurance (as most of these patients don't have cataracts). The lens exchange takes away the need for cataract surgery in the future and typically stabilizes the vision going forward.
The artificial lenses we place in a lens exchange are called Intra-Ocular Lenses, or IOLs for short. They come in many varieties but we pare them down to single focus (only abel to focus at one area of vision such as distance, and then wear glasses for up close) or multifocus (where you have multiple areas of vision in focus without glasses). The newest multifocal IOL, the panoptix, was recently approved by FDA and corrects near, intermediate, and distance in each eye so you have glasses independence for all ranges except the really close stuff. These have been used in Europe, asia, and Canada for years and have really taken over the market for patients wanting this type of lens.
A lot more info, probably more than you wanted, but that's a start.