(though there is speculation it may be benefit from some extended depth of focus, which is what the Symfony is designed to use to begin with).
I'll continue this in another post in a few minutes.
The other thing the Symfony does is to correct for "chromatic aberration", an issue which is discussed in this industry publication which quotes one prominent surgeon noting: Cataract surgery with an IOL with an Abbe number greater than that of the natural lens (47) can improve CA, so that our cataract patients could actually experience better vision quality than they did as young adults.
" Although the Symfony uses a high Abbe material (I'm assuming its the same Tecnis material that article lists as having a 55 Abbe), it also has other features to to correct for CA to improve image quality.
It seemed like a good bet the image quality for distance would be comparable, and perhaps even better, than a monofocal lens, or an accommodating lens.
Again the level of near vision you have will be more than with a monofocal IOL since even your distance eye can focus a bit near still at your age.Not everyone achieves this level of near vision with the lens so people shouldn't expect to necessarily get quite as good a result, and should be prepared for the possibility for needing reading glasses at near.I suspect the fact that I'm comparatively young for cataract surgery, 52, might have something to do with the results.However the studies so far seem to indicate that the Symfony provides better quality intermediate vision.In addition multifocal lenses reduce contrast sensitivity which is useful for night vision, while reports indicate the Symfony is at least as good as a monofocal lens.My intermediate vision hasn't been tested explicitly but I suspect is at least 20/20.