Quote:
Originally Posted by SpankyJ
Getting bifocals (or I guess they call them progressive lenses or something these days). Had them for a few years now.
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Bifocals (or even trifocals) have the line(s) and the very visible areas where the lenses differ. You don't see classic bifocals as much anymore, but they're still around because IIRC they're cheaper than progressive lenses.
Progressive lenses are ground in such a way that there's no lines, and the various areas where the focal lengths of the lenses differ aren't as visible.
Cheers,
bcg