Has anybody tried these yet?
From what I gather on their website there is a lot less distortion (but what progressive doesn't say that). It also has wider intermediate and a fourth zone?
Has anybody tried these yet?
From what I gather on their website there is a lot less distortion (but what progressive doesn't say that). It also has wider intermediate and a fourth zone?
It would help if I included the website:
http://definitycommunity.com/view/index
My notes from the original JJ design says long corridor, soft, moderate distance off-axis blur, power rate in corridor seemed more linear than others.
The patent paper I read attributed the unwanted astigmatism advantage of the split design to about 7%. Of course, one can say it's much more than that compared to a PAL that has higher levels of unwanted astigmatism, but it's not due to the split design, it's due to good lens design, and a long corridor with soft boundaries.All progressive lenses have some distortion (represented by the shaded areas in the diagram above), but with DEFINITY, the amount of distortion is dramatically less. - See more at: http://definitycommunity.com/view/fa....AMoiqzpJ.dpuf
From my experience, it's a good design for hyperopes, and maybe emerging presbyopes.
Hope this helps,
Science is a way of trying not to fool yourself. - Richard P. Feynman
Experience is the hardest teacher. She gives the test before the lesson.
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