8-9 Base Curve?

**haliopt** · 02-13-2008, 06:57 PM

Hi Folks; Can anyone tell what progressive comes in 1) poly-prog-polarized-brown-8-9-10 base curve? 2) poly-prog-clear-8-9-10 base curve(I know image comes poly-8 base curve,any others?)
Rx is -2.00-0.50x080,-2.50-0.25x090 +1.50ou.
Any help will...well...help.
Thanks haliopt

**chip anderson** · 02-13-2008, 07:17 PM

Ice-Tech.

**Judy Canty** · 02-13-2008, 09:03 PM

try www.thelensguru.com

**haliopt** · 02-13-2008, 09:20 PM

Thank you Judy. This site is awesome. I will use this site often... I found just what I was looking for.Thanks again. haliopt

**Judy Canty** · 02-13-2008, 09:31 PM

Hey, any time! TLG is one of US!!

**MarcE** · 02-14-2008, 12:47 AM

I think (but not for sure) that you will have problems if you put a traditional front add PAL of -2.50 in a 8 or 9 BC. These progressive lenses are designed for certain Rx ranges and unlike a SV lens, they just won't work in an extreme "off the chart" BC like that.

Someone tell me if I'm wrong.

Otherwise - Ice Tech can make it work.

**Barry Santini** · 02-14-2008, 12:20 PM

Maui Jim is about to announce new, free form progressives AND single vision lenses:

1. Completely-iterated, free form designs
2. 4 6 and 8 Base Curves

Potentially, the best sunlenses on the market

Opinions?

barry

**Jacqui** · 02-14-2008, 12:59 PM

Doesn't Shamir have an 8 base progressive??

**Robert Martellaro** · 02-14-2008, 01:46 PM

Originally Posted by MarcE

I think (but not for sure) that you will have problems if you put a traditional front add PAL of -2.50 in a 8 or 9 BC. These progressive lenses are designed for certain Rx ranges and unlike a SV lens, they just won't work in an extreme "off the chart" BC like that.

Someone tell me if I'm wrong.

Kbco addresses this problem by using asphericity to minimize off-axis errors created by using too steep of a BC on the minus Rxs. I thought they had 5 different degrees of asphericity across the power range but I see no mention of this at their website. Maybe I'm thinking of another lens? Shamir's Attitude employs similar tactics but is available in gray only.

Otherwise - Ice Tech can make it work.

For some, the best solution, combining the above with free-form surfacing.

**Barry Santini** · 02-14-2008, 01:50 PM

Originally Posted by Robert Martellaro

For some, the best solution, combining the above with free-form surfacing.

Robert, this is exactly what I was told by the Maui guru of lenses that MJ is ready to introduce

Barry

**drk** · 02-14-2008, 07:24 PM

Hold onto your wallets.

**optigrrl** · 02-15-2008, 11:41 AM

Originally Posted by Jacqui

Doesn't Shamir have an 8 base progressive??

Piccolo with attitude.

**HarryChiling** · 02-15-2008, 02:08 PM

Originally Posted by drk

Hold onto your wallets.

You can ease on the wallet they're going after the deed to the barn on this one. ;)

**Robert Martellaro** · 02-15-2008, 02:53 PM

Originally Posted by Barry Santini

Robert, this is exactly what I was told by the Maui guru of lenses that MJ is ready to introduce

Barry

Barry, I wonder how it compares to the Ice Tech lens. Their website is not clear in this regard. My guess is it might be optimized off-axis up to a certain degree of ocular rotation, and then the optics are over-corrected (trashed) to achieve a thinner edge.

http://www.ice-tech.com/ice-techrx.asp

I forgot to include a link and the name of the Kbco lens- EOS Wrap.

http://www.kbco.net/products/eos_wrap.html

Originally Posted by optigrrl

Piccolo with attitude.

I still don't understand why they would use their short corridor lens for a wrap. What were they thinking?

**Barry Santini** · 02-15-2008, 04:01 PM

Robert:

here's what I know about the new MJ wrap technology:

1. 4,6,& 8 BC for (almost) all MJ frames
2. Lens designs are based upon already-optimized wrap front curves, but..
3. then the back surface is further optimized/iterated using free-form for the particular, HTs, PDs, Rxs, curves, and frame dimensions.
4. Panto and VD have assumed default values
5. Wrap angle is supplied by MJ, and true wrap angle is calculated from the actual measurements involved, before the optimization algorythim is applied.
6. The OEM vendor is a well-know company (more later...)
7. Progressive AND SV...making this amongst the few SV wrap designs to really offer the potential for superior correction (ICE-TECH was amongst the first to offer this technology)

Hope this helps

Barry

**HarryChiling** · 02-16-2008, 01:23 AM

Originally Posted by Robert Martellaro

I still don't understand why they would use their short corridor lens for a wrap. What were they thinking?

Robert,

I have had the greatest succes with the shorter corridor lenses in wraps, the size and power of the corridor is often unpredictable in wrap frames due to the wrap, the shorter corridors along with tilting reduces to almost eliminates the useable intermediate portion of the lens makig it behave more like a blended bifocal than a progressive. I have found that most of the patients I have fit in shorter corridors in wraps have liked them more often than not.

**Robert Martellaro** · 02-18-2008, 03:01 PM

Originally Posted by HarryChiling

Robert,

I have had the greatest succes with the shorter corridor lenses in wraps, the size and power of the corridor is often unpredictable in wrap frames due to the wrap, the shorter corridors along with tilting reduces to almost eliminates the useable intermediate portion of the lens makig it behave more like a blended bifocal than a progressive.

That almost sounds like less of an argument against long corridors and wraps, and more of an argument against PAL wraps in general.:)

I have found that most of the patients I have fit in shorter corridors in wraps have liked them more often than not.

Harry, IMO, you'll get more peripheral distance blur with a -3.00 shorty on a four base than you'll get with a non-optimized long corridor -3.00D Rx on an eight base, and probably less refined on-axis vision to boot. Tilting and compensating will not make this go away.

Originally Posted by Barry Santini

here's what I know about the new MJ wrap technology:

Hope this helps

Barry

It sure does, thanks. Hopefully it comes in brown, which is about all I use nowadays.

**HarryChiling** · 02-20-2008, 10:06 PM

Originally Posted by Robert Martellaro

That almost sounds like less of an argument against long corridors and wraps, and more of an argument against PAL wraps in general.:)

Gotta say I don't like doing progressives in wraps and often tr and convince a patient that it isn't a great idea, but for instance I have had great sucess with the liberty which is not a shorty, but works well (the only problem is that is only comes in a 7.25 in poly, but he plastic comes in 7.75), brevity it's a shorty and comes in an 8.00, proceed short comes in a 7.25 and a 9.00 it's a shorty, ovation which comes in a 6.50 fit's some wraps well, and of course image tried and true comes in a 8.50 in plastic. I guess all are not short, but I do have pretty good success with shorties, I don't put to much stock into the width of the corridor or even trying to make sure their is one there, often in sunglasses the tasks performed are either distance oriented or near, so the width of these two zones is the key to success, I find harder designs also work better than the soft since the majority of the tasks are again distance oriented.

**HarryChiling** · 02-20-2008, 10:17 PM

Originally Posted by Robert Martellaro

Barry, I wonder how it compares to the Ice Tech lens. Their website is not clear in this regard. My guess is it might be optimized off-axis up to a certain degree of ocular rotation, and then the optics are over-corrected (trashed) to achieve a thinner edge.

I hope tht this is the solution they use, if they did they would be the first to apply this to a progressive that I know of.