Darryl those index numbers nd or ne?
Originally Posted by Darryl Meister
Darryl those index numbers nd or ne?
Originally Posted by Darryl Meister
ndOriginally Posted by Jim Stone
Best regards,
Darryl
Both?Originally Posted by Darryl Meister
Yep. Though I've seen figures for MR-6 vary slightly, depending upon the supplier.
Best regards,
Darryl
Well said. Splitting hairs on which one is a tenth of a millimetre thinner or what is slightly stronger is not the main thing. It is like choosing between a titanium-75 and a beta-titanium frame. What it comes down to is the lens design and the coatings, because if a customer is not happy with the vision or if the coating keeps crazing they will not deal with you again, but a customer could not tell the difference between MR-7 and MR-10.Originally Posted by Pete Hanlin
Yeah, but not just thickness! Some polymers have better abbe and specific gravity, too. Some are better to drill. Maybe we're still hairsplitting, but it can add up.
Last edited by drk; 06-22-2004 at 12:57 PM.
Hello, I am a newbie to these boards, but not to the optical industry (34 years)Originally Posted by drk
I am currently wearing the Varilux Panamic 1.67 with Crizal Alize AR. I hate them! I was used to Spectralite's high ABBE and thought maybe with the Seiko resin it might be better than the Zeiss Gradal Top 1.67 I had several years ago. But still, these modern LED signs are unreadable for me once I get 5mm or more from center. They split up into separate red,blue and original colors so I see at least three of everything. The color fringes around everything are twice as evident as they were in Spectralite. I see from other post the Finalite has a better ABBE, but I still have some problems with my SV finalite computer lenses. So I guess I'm stuck with SolaMax in Spectralite Trans with Zeiss Carat Advantage AR.
Did I mention I'm a -10.75 -2.50 with a 2.75 add?:bbg:
I am considering Trivex, but is Hoya's Summit prog any better than the venerable Image? Any other prog in Trilogy that someone recommends?
You can get the Shamir genesis in trivex, this is an excellent design... however with your script it will be thick.
Originally Posted by Dragonlensman
Thick, schmick. I'd rather see well.I believe that in many cases, going to the thinnest lens with the highest index can be a disservice to our customers. I have a M.d. customer -12.25 sph o.u.) whom we had always put in 1.67 because she wanted them thin as possible. After Trivex came out, we actually talked her into a smaller frame and sheliked her Trivex so much, she has bought four pairs. Two for distance, two for near. She won't wear progressives, though I may start working on her next time to try a pair.Originally Posted by slaboff
On a different note, anyone notice what Essilor did to their Ormex material? We had used that for years as our mid-index lens of choice, high ABBE, 1.558 index, and hard enough to not need a back coat. Now Essilor has dropped the index to 1.502 - USELESS!:angry: Back to Spectralite.
I just had hoya send me some blanks in -4.00 in CR39, Phoenix/Trivex, Poly, Seiko 1.67, and their 1.71.
All were cut to the same shape (Silhouette 7508/50)
Trivex is visibly thicker than the poly
Seiko 1.67 is NOT visibly thicker than 1.71 !!! (It does look thicker in +4.00)
There would not be much of a difference between a 1.67 and a 1.71 until you hit about 10D.Originally Posted by allanon
Hi, I've read your opinions on the Seiko 1.67 with great interest.
How about Tokai lens (1.7)? How do you think this compares to the Seiko?
Also, let me say that I'm not working in the industry. Rather, I'm an interested consumer, with a -5.0 prescription.
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