Anyone here familiar with IOT designs, including the "Basic" and "Alpha" series?
How are these lenses?
Thanks
Anyone here familiar with IOT designs, including the "Basic" and "Alpha" series?
How are these lenses?
Thanks
IOT is by far the best house progressive line... Many manufactures provide house lenses, but do so they usually use an old discontinued model 2-4 generations old. None of them offer their latest offerings because they don't want to compete with their premium lines. You simply don't get their best tech, its either old or deliberately "gimped".
IOT isn't offering a "branded" or not branded line, they are not competing against themselves. They can offer their best lenses as house lenses.
The newer Alpha line is now wearer tested (since their purchase by Younger) and uses Digital Ray tracing, so you get everything that many premium progressive offer...
The downside is they only offer T and Hourglass shapes, but they are great T and Hourglass shapes. But they don't offer the more complex corridor designs yet such as the InTouch or Seiko Supernal and Superior Far where the declination is variable, They don't offer the V shape of the Zeiss Choice, or the reverse geometry design of the Seiko Surmount.
About 70% of free-form lenses are T or Hourglass shapes though...
The IOT Basic series offers 100% Backside Add, Base Curve Comps and basic Aspheric design...
The IOT Alpha series will add to that Digital Ray Tracing, real world wearer testing, POW compensations (either based on averages, or individually measured), more advance aspheric and atoric calcs.
We have been using IOT exclusivly for over a year now. They are fantastic lenses. Previously used Kodak with OK results but the IOT lenses seem to be easier to adapt to. Complaints and problems definately decreased when we swiched.
~ Erin
ABOC
Originally Posted by eryn
Thanks for the reply. Which designs have you been using?
Alpha Series
~ Erin
ABOC
Have you tried the H45? this is the one being offered to me... any thoughts?
We use the H45 as our balanced design (the H65 has more emphasis on distance, and the H20 has more emphasis on near), and it sells very well, low remake rate for non-adapts. Can be used in wrap frames as well.
We're selling lens designs from both the Alpha and Basic series, as well as their Outdoor and Office Reader lenses.
There are rules. Knowing those are easy. There are exceptions to the rules. Knowing those are easy. Knowing when to use them is slightly less easy. There are exceptions to the exceptions. Knowing those is a little more tricky, and know when to use those is even more so. Our industry is FULL of all of the above.
We use H45 and use it 95% of the time. I havent experimented enough with H65 and H20 to offer an opinion.
~ Erin
ABOC
Threadjack!
I am attracted to the simplicity of the classification system of PAL designs as "T" or "hourglass" (male or female, but that makes me sound like a creep. Maybe I am!)
So what others are there? A "V" pattern? The "V" pattern is like the Surmount, right? And whatever fthe Zeiss Choice is?
I've looked at my share of astigmatism contour plots. The picture below pretty much sums up what a progressive lens looks like: a wide distance tapering into a narrow corridor, flaring into a slightly wider near. Distance zone widths (.50 DC limits, +2.00 add) range from 5mm to 20mm, intermediate widths from 3mm to 5mm, and a near width from 4mm to 12mm.
-Progressive addition lenses—measurements and ratings Jim Sheedy, O.D., Ph.D., Raymond F. Hardy, B.S., and John R. Hayes, Ph.D.
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.
Any rules of thumb you use for the MFH of the alpha? They have several "MFH" designations, and have you found a "go to" version which works most of the time?
Darn it, Robert, I was trying to make this subject a little sexier.
I would like to say what your thinking, but I usually get in trouble when I do this outside of cocktail hours.
OTOH, it's rather boring around here, so let's just say,
I like the Shamir Piccolo because it has a...
BTW, they're all playing bass guitars.
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.
Good question Drk, where 95% of traditional lenses are an hourglass shape, Free-form you can do almost anything. V shape is the Varilux S and Zeiss GT2 3D, the Shamir InTouch and Zeiss Choice, Seiko Supernal, Seiko Superior Far are almost a V, but they have a tiny bit of flair out at the bottom of the reading, so I call those a Fountain Shape. Its easy now, about 4 years ago I had to use a AR Dual lens mapper and substitute (essentially neuturalizing the Free-form compensations) with a SV Free-form LDS file to deconstruct the shape of Free-form lenses. Now there is a Visiononix lensometer that does this automatically.
Surmount is unique, its a barrel shape essentially with 2 corridors, inverted with the wide end toward the pupil instead of the narrow, the intermediate is the widest portion of the lens. There is also a Plus Shape, interestingly, the Hoya iD and Definity look very similar mapped, but they get there very different ways.
In your price sheet, what is the H45 called?
Love it. Great post.
It's the Versatile B.
There are rules. Knowing those are easy. There are exceptions to the rules. Knowing those are easy. Knowing when to use them is slightly less easy. There are exceptions to the exceptions. Knowing those is a little more tricky, and know when to use those is even more so. Our industry is FULL of all of the above.
Talk about mud flaps, my PAL's got em!
How could I leave this behind?
Alright so which PAL goes to Eleven then?
IOT Ultrashort goes to 10....
That's like.....one shorter than eleven.
One-up.
Two-up.
The champ is a '55, I think.
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.
My Fender Blues Deluxe goes up to 12 also! (which is one louder than 11!)
How much blacker can it get? None. None more black.
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