Nulens iol accommodating
The Synchrony has an anterior optic with a high plus power and a posterior optic with a high negative power (Figure 1).
The dual-optic design yields a power that is equivalent to that of a standard IOL.
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Some background facts: Pre-op, I was mildly myopic (-1.75) in this eye and mildly astigmatic (about 0.94 cylinder).
Also, at 44 I'd already gotten used to presbyopia, and typically would wear 1.25 readers for near.
The real issue for me is my near vision, which is much worse than I was expecting.
I do know that the Symfony isn't all-around perfect, that e.g. And I know that's just an average, but even the distributions left me hopeful, with 81% of trials patients achieving 20/40 or better (that's monofocally; 96% were better than 20/40 bifocally).
All patients in the FDA phase 3 study have completed 1 year of follow-up, and the company plans for an FDA premarket approval submission this fall (Jim Simms, oral communication, August 2009).
While the ciliary body is relaxed, the two optics are relatively close together for distance vision.
As the ciliary body contracts and the zonule relaxes, the optics move apart, thus increasing the power of the lens and resulting in near acuity.
Theoretically, 1.5 mm of separation should result in about 3.50 D of accommodation.
In a prospective study, presented at the 2009 ASCRS meeting, Ossma and colleagues randomly assigned 100 subjects to receive either a Synchrony IOL or an Acry Sof Restor IOL in both of their eyes.
Now four days since having the surgery, I'm mostly satisfied: colors are much brighter and more vibrant (and more pinkish, bluish, interestingly), my distance vision is now restored and fine, and I can see pretty well at intermediate distances, i.e.