I was told that you are the people to talk to about progressive lenses.
I've recently ordered some single-vision glasses from Zenni, and expect to be pleased with them. But, my prescription is bifocal, and I'm somewhat vane. I'll be ordering at least one pair of progressives, as well. But, before I do, I had a few questions.
What progressive design to you use? Does it have a narrow or a wide corridor? How well does it address intermediate vision? etc... Basically, what kind of progressive would I be getting?
Where do you place the corridor? Since there is no place on the order form for a vertical location, I presume it's at a standard height -- what is that height?
And finally, can I make adjustments to segment height in the "special instructions" field on my order form, if necessary?
I've never worn progressives before, but have a local optometrist who is willing to work with me for measuring, fitting, etc.
Thanks for your quick response.
-- Chuck Knight
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01/08/08
Dear Customer,
Our progresive has a narrow corridor.
The
design of the lens is such that there is less room for the reading function due
to the fact that an additional focal field has been added (for the middle range
vision). Approximately, the lower central third of the lens is dedicated to the
reading function, and in order to keep that corrected area in front of your
pupil, it becomes necessary to turn your head, slightly, from side to side.
By design, the progressive lens is quite serviceable for general wear, but if you plan on doing a great deal of close work, or reading, you may be better served by adding a back-up pair of single vision reading glasses, in which the entire lens is dedicated to the reading function, or just use bifocal glasses.
With the progressive lens, the accuracy of the PD number is critical. And the stronger your prescription, the more crucial the accuracy becomes. A millimeter or two, particularly if the prescription is strong, will make a big difference in the clarify of your vision.