Hi,
If anyone knowledgeable (this excludes you,gato) feels so inclined to
answer some questions I have, it would be appreciated. First a little
history.
I'm 50, and have gotten by up til now without bifocals due to slight
myopia and slight presbyopia. I thought it was time to finally bite the
bullet and try progessive bifocals. My Rx is :
OD -1.25
OS -1.25 -0.50 x 75
Add +2.00
My last pair of several years ago were virtually the same, but no add in
the glasses. They were perfect for distance; I would need to take them
off to read. For tiny print or detailed work, I would use some cheap
readers.
Well my optometrist put me in Varilux panamics, and of course, not being
used to progressives, I initally thought it was outrageous, no way.
After several weeks of adaptation, I notice that they are very nice for
driving (where my vision is concentrated along the central axis) or
watching television, but still find them less than ideal in other areas
for 2 reasons:
1. When shopping or just going about my business, I have to deal with
the usual peripheral distortions at distance, but for close up, I find
the continual necessary head bobbing (horizontal and vertical) just so
annoying that I end up just taking them off. If I'm going to do that...
where's the benefit over my old glasses? In particular, this is because
I find the reading area just too narrow. My question here: Is there
something intrinsic in the panamic design that might be bothering me
that I might find less annoying in comfort or some other design?
2. I notice chromatic aberration everywhere off the centerline. These
are lightweight glasses, and I found the chromatic aberration so
annoying that I assumed they were polycarbonate. But after checking the
engraving marks, I see they are ormex. My optometrist tells me this is
the lowest index (though I'm really interested in the highest abbe)
material that varilux panamics are available in. He suggested I try
varilux comfort, which are available in a lower index material. My
question : Can anyone verify what materials (and their index or abbe #s)
are indeed available for panamic and comfort; and is it possible I might
find the comfort design less annoying, or are they all pretty much the same?
Sorry for my babbling, but these things are driving me nuts. Oh, and to
anyone who suggests going to conventional lined bifocals.... I slapped
on some +2.0 stick-on plastic lenses to my old glasses and have
effectively converted them into what seem like decent bifocals!
Thanks,
Bob
Mark A - 02 Feb 2005 19:04 GMT
> Hi,
>
[quoted text clipped - 28 lines]
> something intrinsic in the panamic design that might be bothering me
> that I might find less annoying in comfort or some other design?
I don't think the reading area of the Panamics are different from the
Comforts, or at least very little difference if any.
> 2. I notice chromatic aberration everywhere off the centerline. These
> are lightweight glasses, and I found the chromatic aberration so
[quoted text clipped - 6 lines]
> are indeed available for panamic and comfort; and is it possible I might
> find the comfort design less annoying, or are they all pretty much the same?
Ormex (1.56) is not the lowest index. The lowest index is regular plastic
1.50 (CR-39). It is available for both Comfort and Panamic according to the
Variluxpro website.
> Sorry for my babbling, but these things are driving me nuts. Oh, and to
> anyone who suggests going to conventional lined bifocals.... I slapped
[quoted text clipped - 3 lines]
> Thanks,
> Bob
There are some lenses with a wider reading area, but maybe not as good of an
intermediate transition area. Sola Solamax in Spectralite (1.54) material is
one such lens.
If you have the bucks, you could try one of the high end Rodenstock lenses.
Keep in mind that the problem could be related to a fitting error, so check
that first. Also, the taller the lens, the better the reading area,
regardless of the advertising hype about how you can use very short frames.
Make sure you know what the refund warranty is. Most lens manufacturers
offer a 30 day warranty, so don't let it pass if you are not satisfied.
Robert Martellaro - 02 Feb 2005 21:42 GMT
>Hi,
>
[quoted text clipped - 46 lines]
>Thanks,
>Bob
Bob,
I'am pretty sure the Panamic only comes in the Ormex material if the lens is
Transitions. So if you don't have Transitions the lens is either not ormex or is
not the Panamic. The abbe number for Ormex is 37.
You wear your glasses full time? The line will really be aggravating.
> I notice chromatic aberration everywhere off the centerline.
Describe what you "see" and be as specific as possible.
While standing, look out the window at a road sign or address that's just barely
readable. With both eyes open, can you make the letters or numbers clearer by
moving your head up, down, right or left? Let me know.
Robert Martellaro
~~~~~~~~~~~~~~~~~~
Optician/Owner
Roberts Optical
robopt@execpc.com
~~~~~~~~~~~~~~~~~~
"If a million people believe a foolish thing, it is still a foolish thing."
- Anatole France
Dom - 02 Feb 2005 23:28 GMT
> Hi,
>
[quoted text clipped - 28 lines]
> something intrinsic in the panamic design that might be bothering me
> that I might find less annoying in comfort or some other design?
The first thing to check is always the alignment of the lenses against your
pupils. This is much more likely to be the cause of your problems than
something intrinsic in the lens design. They only need to be out by 1mm or
less to cause a problem with a narrow reading area.
Panamic is a good design (but not the only good design).
> 2. I notice chromatic aberration everywhere off the centerline. These
> are lightweight glasses, and I found the chromatic aberration so
[quoted text clipped - 6 lines]
> are indeed available for panamic and comfort; and is it possible I might
> find the comfort design less annoying, or are they all pretty much the same?
Again, what you describe as chromatic aberration could simply be peripheral
distortion due to off-centered lenses - see above.
> Sorry for my babbling, but these things are driving me nuts. Oh, and to
> anyone who suggests going to conventional lined bifocals.... I slapped
[quoted text clipped - 3 lines]
> Thanks,
> Bob
People with eyes like yours rarely get better vision for reading and
intermediate than your own natural vision. The advantage of progressive
lenses for you is not clearer vision, but just the fact that you don't have
to keep taking them off to read.
Dom
Joe Stella - 03 Feb 2005 12:02 GMT
>[...]
>1. When shopping or just going about my business, I have to deal with
>the usual peripheral distortions at distance, but for close up, I find
>the continual necessary head bobbing (horizontal and vertical) just so
>annoying that I end up just taking them off.
One trick you can use is to tilt the page (or whatever you are trying to
read) away from you, so that the top of the page is further away than
the bottom. Then you will be able to see the top of the page more
clearly through the intermediate focus portion of the lens. This
will decrease your head bobbing somewhat.
>If I'm going to do that...
>where's the benefit over my old glasses? In particular, this is because
>I find the reading area just too narrow. My question here: Is there
>something intrinsic in the panamic design that might be bothering me
>that I might find less annoying in comfort or some other design?
I have read elsewhere that the Panamic requires an accurate fit. Did
your optician take very careful measurements of your inter-pupilary
distance? Getting this wrong can seriously decrease the reading and
intermediate focus area.
>[...]
Greg Beaulieu - 04 Feb 2005 00:03 GMT
: 1. When shopping or just going about my business, I have to deal with
: the usual peripheral distortions at distance, but for close up, I find
[quoted text clipped - 4 lines]
: something intrinsic in the panamic design that might be bothering me
: that I might find less annoying in comfort or some other design?
I have had 2 sets of Varilux Comforts and although I am generally happy
with themm, shopping is the one thing that has been a bit problematic.
Reading fine print on shelf tags is always a challenge for some reason.
--
Greg Beaulieu ab348@chebucto.ns.ca Dartmouth, Nova Scotia, Canada
Robert Martellaro - 04 Feb 2005 18:17 GMT
>I have had 2 sets of Varilux Comforts and although I am generally happy
>with themm, shopping is the one thing that has been a bit problematic.
>Reading fine print on shelf tags is always a challenge for some reason.
Greg,
No kidding! You need to have a neck like a cat to see the bottom shelve. Another
example of how cats are superior to humans.
Robert
Dennis Roark - 21 Feb 2005 00:14 GMT
> Hi,
>
[quoted text clipped - 35 lines]
> Thanks,
> Bob
My previous PALs were Varilux (made by Essilor) and I had some of the
same problems you described. A few months ago I switched to the Johnson
& Johnson Definity which I find a great improvement. They must be made
at the J&J site in Roanoke. But I no longer have the strong peripheral
distortions that, as for you, would be particularly disconcerting while
walking down a shopping aisle and have the shelves on both sides of me
go out of focus. There is also less of what I would call a "swimming"
sensation. I really could not be happier. The corridor width for clear
intermediate and near vision is greater than before, even though my add
increased slightly (+2); and the gentleness of the transitions between
zones is excellent. The lenses do have to be fitted correctly, the
first pair I had to send back. The pupil should be very precisely on
the marking of the lens. The J&J shop did an excellent job, but the
local fitting optician was sloppy in the first fitting. You should
check it yourself.

Signature
Dennis Roark
denro@sio.NOSPAMmidco.net
Starting Points:
http://sio.midco.net/denro/www