Zenni: Intermediate Zone Size in Progressive Lenses?

[powrwrap]

I'm trying to get an answer out of Zenni Optical. This is the first
time they've disappointed me. I emailed them a question regarding the
size of the intermediate zone in their progressive lenses and they
promptly emailed me back--with an answer that didn't address my
question directly.

I emailed them again two days ago, rewording the question, but haven't
received an answer yet. I just tried calling them but they aren't open
yet (they're on PDT)

My question is this:

Does the size of the intermediate zone change with different sized
lenses? For example, would a larger lens have a larger intermediate
zone? Specifically, how do the intermediate sized zone of these lenses
compare?:

50mm X 33mm (Zenni lens #233)
52mm X 35mm (Zenni lens #234)
51mm X 38mm (Zenni lens #235)

I currently have lens #233 in a rimless frame and love the style. My
prescription has changed so I'm buying new glasses. I'm looking to
increase the size of the intermediate zone and if a larger lens will
accomplish that I'll go with it; if not I'll get my same style/lens
size.

Someone posted some specs on Zenni's progressive lenses a while back
but I've searched the group and couldn't find them. Anybody know when/
where that thread is?

[Chuck]

Here's a dump of the whole conversation I had with Zenni about
progressives... Hope it helps! Unfortunately it doesn't give any
specifications about the size of the intermediate zone.

-- Chuck Knight

_____________________________________________


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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Zenni Optical
1.08.08 Dear Customer, 1. We don't do custom segment height for lined
bi-foca...

Jan 9
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1.08.08

Dear Customer,

1. We don't do custom segment height for lined bi-focal or progressive
glasses. The standard to which we produce multi-focal lens is,
depending on the size of the lens, approximately 40% up from the
bottom of the lens for a lined bi-focal, and 48% up from the bottom of
the lens for a progressive lens design.

2.By the way, we want to confirm if you wore progressive glasses
before? If not, we would suggest you to choose bifocal or single
vision glasses for reading or for distance. Because if you are a new
user of progressives, you may not get used to wearing them.

Thank you for your interest in Zenni Optical.

ZOCS:TT
- Show quoted text -



On 1/9/08, Charles Knight <chuck...@gmail.com> wrote:

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


Reply

Forward

Invite Zenni Optical to chat

Charles Knight
Thank you for your quick response. It's much appreciated. I was
wondering one...

Jan 9
Charles KnightLoading...
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Charles Knight to Zenni

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Thank you for your quick response. It's much appreciated.

I was wondering one other thing, though. Of the many progressive
designs, I presume that you use only one. Which one?

-- Chuck Knight
- Show quoted text -



On Jan 9, 2008 1:21 AM, Zenni Optical <zenn...@gmail.com> wrote:

1.08.08

Dear Customer,

1. We don't do custom segment height for lined bi-focal or
progressive glasses. The standard to which we produce multi-focal lens
is, depending on the size of the lens, approximately 40% up from the
bottom of the lens for a lined bi-focal, and 48% up from the bottom of
the lens for a progressive lens design.

2.By the way, we want to confirm if you wore progressive glasses
before? If not, we would suggest you to choose bifocal or single
vision glasses for reading or for distance. Because if you are a new
user of progressives, you may not get used to wearing them.

Thank you for your interest in Zenni Optical.

ZOCS:TT



On 1/9/08, Charles Knight <chuck...@gmail.com> wrote:

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



Reply

Forward


Zenni Optical to me

show details Jan 9


Reply



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.
Thank you for your interest in Zenni Optical.

ZOCS:SX


___________________________________________________________________________

[powrwrap]

> On May 13, 1:24 pm, Chuck <chuckkni...@gmail.com> wrote:

> Here's a dump of the whole conversation I had with Zenni about
> progressives...  Hope it helps!  

Chuck, I should have known it was you. Thanks for the info.

I phoned them around 10:00 am PDT. I was on hold for 9 1/2 minutes.
The woman was courteous and explained that a larger lens would result
in a slightly larger "mid-zone" vision area, or the area used to see a
computer screen. (This happens to be the exact area I was looking to
improve). She couldn't say exactly how much bigger, just spoke in
generalities.

My current pair of Zenni's are a rimless design with lens #233. It
looks like a rimless version of your glasses, with the lenses a bit
more egg-shaped than perfect ovals.
http://www.chuckknight.com/pics/me.jpg

I'm thinking if I go to lens #234 (at 2mm wider) it would give me a
slightly wider intermediate corridor than lens #233.

I guess I'm off to an optical shop to try on some frames with similar
lenses to see how they look on my face.

[ehb]

I have progressives from Zenni and they are the BEST pair of glasses I
have at the moment. I have better vision out of them then the $490
trifocals I got from the local optician but, like most progressives,
the mid distance part is small compared to my trifocals. My solution
was to get a pair of single vision mid distance computer glasses.(I
got them from Global.) The Zenni lenses are very good but if you want
a wider mid distance I would suggest getting Varilux Phisio 360 lenses
from Global. The leness are $349 plus frame from them but this is
several hundred dollars cheaper than from a brick and morter. The
Physio 360 lens has one of the wider mid distance areas and is
considered to be one of the best progressive lenses on the market
right now.
The problem with mid distance in progressives is that this occurs in
the most narrow part of the corridor so you have to be looking exactly
straight ahead for the clearest vision. The Zenni lens does appear to
have a very soft design because, even with my very strong prescription
I notice very little distortion in the peripheral areas of the lens,
particularly in the distance and reading areas, but in the mid range
the distortion is more noticable.
If you have never worn progressives, they are different than bifocals
and trifocals. In bifocals and trifocals you can move your eyes from
side to side. With progressives you need to 'point your nose' at what
you want to look at.

On May 13, 3:41 pm, powrwrap <powrw...@aol.com> wrote:
> > On May 13, 1:24 pm, Chuck <chuckkni...@gmail.com> wrote:
> > Here's a dump of the whole conversation I had with Zenni about
> > progressives... Hope it helps!
>
> Chuck, I should have known it was you. Thanks for the info.
>
> I phoned them around 10:00 am PDT. I was on hold for 9 1/2 minutes.
> The woman was courteous and explained that a larger lens would result
> in a slightly larger "mid-zone" vision area, or the area used to see a
> computer screen. (This happens to be the exact area I was looking to
> improve). She couldn't say exactly how much bigger, just spoke in
> generalities.
>
> My current pair of Zenni's are a rimless design with lens #233. It
> looks like a rimless version of your glasses, with the lenses a bit

> more egg-shaped than perfect ovals.http://www.chuckknight.com/pics/me.jpg

[Chuck Knight]

I appreciate that comment, thank you.  I do try to do my homework on such things.

Turns out my prescription changed, and is no longer bifocal!!!  I'm happy, and my vanity is intact...but maybe the information can help others.

     -- Chuck Knight

P.S.  I no longer wear those glasses...my newer ones are more rectangular, and full rimmed.  Different style, different look.  Zenni, frame 5833 is my current look...and I love the magnetic sunglass clip.  Works great.

[mzdtk]

Okay this is not any measure but I had one pair of progressives form a
B&M before I got progressives from Zenni and I find no difference in
the "corridor" I can tell you that when you order with a lens less
thatn 30 mm high there honestly is less room to fit it all in. You
need space for distance and then a gradual fade to close but the fade
is where progressives are awsome. I no longer make my neck ache trying
to read the computer screen. You simply need to learn to turn your
head to see anything but what is infront of you. I have fibromyalgia
and have had no increased neck pain from turning my head to see things
off to the sides. You need to want to get used to them and then train
yourself to use them correctly its easier than you think.