Hi l have been told l need cataract surgery in a year or two. At the moment l still have excellent 20/20 vision distance vision without glasses , if l go with mono focal distance lens is there any risk l could loose my good 20/20 vision or need to wear glasses to have good distance vision . if for example they get the eye or lens focus measurement slightly incorrect or dont place the lens in the exact right spot. l am prepared to wear glasses for reading but dont want to have to wear glasses for distance such as TV or driving or outdoors . Even with mono distance lens is there a risk or needing glasses for distance or would that be highly unlikely or near impossible? . Also are there some mono focal distance lens that give better or clearer vision then others , for example for more expensive mono lens or are they all pity much the same in quality of vision