"Trivex" & it's usage

[wrapthisRx]

Hello, looking for some input on Trivex usage in Rx's, eyewear including safety, tinting/ coatings, ect.

1) What are your Rx parameters when using Trivex? I thought I picked up in continuing education that its great for (-4 - +4?)? I seem to notice this being a 14yr lab guru ( @ least i like 2 think that ) & dealing w/this material (trivex) since 2002 during production. Knowing its abbe value, what is your Rx range when selecting any material in today's world where cosmetics seems to be more important than visual performance.

2) Would you or are you using it for everything knowing its purpose & use, including safety eyewear?

3) ECP's & labs, are you seeing any issues w/tinting or coating durability?

Happy New Year to all, Thanks in advance for every1s time & the site is VERY useful!

Jayson.

[SeaU2020]

I like trivex for anywhere you would have used poly before. It tints easier, it's stronger for drill mounts and has great clarity.

[Wes]

And regarding bullets, trivex is more impact resistant than poly!

[Barry Santini]

For string mounts, nothing, and I mean nothing, is more crack, chip and fracture resistant.

B

[SharonB]

And....the grams per cubic centimeter weight is less than poly, and its Abbe value is around 45 - Abbe value makes it a big winner for me!

[wrapthisRx]

And regarding bullets, trivex is more impact resistant than poly!

the ol Oakley tests from the 80s going on here? I've always wanted to test a few rounds on those materials.

[wrapthisRx]

-6.00 - -10.00 powers, Trivex? When do you recommend thinner materials & give up visual performance? Main reason for my question is my doctor in 1 location I run a lab in wants Trivex on EVERYTHING! Some of these powers you can't even fit the nose pad properly when final inspecting due to thickness & of course this is a 1.2-1.5 center thickness. Aspheric is flatter until you pick up a carry curve.

[Wes]

the ol Oakley tests from the 80s going on here? I've always wanted to test a few rounds on those materials.

I did.
http://www.optiboard.com/forums/show...859#post447859

[Kallen]

-6.00 - -10.00 powers, Trivex? When do you recommend thinner materials & give up visual performance? Main reason for my question is my doctor in 1 location I run a lab in wants Trivex on EVERYTHING! Some of these powers you can't even fit the nose pad properly when final inspecting due to thickness & of course this is a 1.2-1.5 center thickness. Aspheric is flatter until you pick up a carry curve.

We ran into this a few times and sometimes trivex just isn't the right call. Afterall, if it is too thick and heavy to wear, the patient won't have it on their face long enough to enjoy any clarity benefits.

[n711]

-6.00 - -10.00 powers, Trivex? When do you recommend thinner materials & give up visual performance? Main reason for my question is my doctor in 1 location I run a lab in wants Trivex on EVERYTHING! Some of these powers you can't even fit the nose pad properly when final inspecting due to thickness & of course this is a 1.2-1.5 center thickness. Aspheric is flatter until you pick up a carry curve.

I think anything over about a -5.00 should be considered it a high-index material.... at some point the pt should be involved in the lens material choice. Cosmmetics MAY be the most important thing for them ...(then 1.67!) but if clarity is the issue (did it hear the word Engineer...??) then 100% Trivex!

my 2 cents

[sharpstick777]

I found many patients, even in low powers, were disappointed that Trivex was not that much thinner than CR-39.

The weight savings is great, the impact resistance is good. But Hi-Vex has a higher ABBE, is less expensive, and a little thinner at 1.56.

1.60 is 42 Abbe, Trivex has 43. 1.60 has much better cosmetics, is drill-able, and finishes very clean (no rough or chattery edges).

Between Hi-Vex and 1.60, who needs Trivex? It expensive and over rated in my opinion.

[n711]

I found many patients, even in low powers, were disappointed that Trivex was not that much thinner than CR-39.

The weight savings is great, the impact resistance is good. But Hi-Vex has a higher ABBE, is less expensive, and a little thinner at 1.56.

1.60 is 42 Abbe, Trivex has 43. 1.60 has much better cosmetics, is drill-able, and finishes very clean (no rough or chattery edges).

Between Hi-Vex and 1.60, who needs Trivex? It expensive and over rated in my opinion.

I don't think I have "used" a 1.60 in 5+ years! AND.... you get what you pay for!

[Fezz]

I found many patients, even in low powers, were disappointed that Trivex was not that much thinner than CR-39.

The weight savings is great, the impact resistance is good. But Hi-Vex has a higher ABBE, is less expensive, and a little thinner at 1.56.

1.60 is 42 Abbe, Trivex has 43. 1.60 has much better cosmetics, is drill-able, and finishes very clean (no rough or chattery edges).

Between Hi-Vex and 1.60, who needs Trivex? It expensive and over rated in my opinion.

I love Trivex, but I am intrigued by HiVex. I need to read up more on it. As far as I know, none of my labs are using it?

[n711]

I love Trivex, but I am intrigued by HiVex. I need to read up more on it. As far as I know, none of my labs are using it?

I haven't even heard of it way out here in Oregon!

[Uilleann]

...who needs Trivex? It expensive and over rated in my opinion.

So perfectly said! Big thumps up to that. :)

[Barry Santini]

I found many patients, even in low powers, were disappointed that Trivex was not that much thinner than CR-39.

The weight savings is great, the impact resistance is good. But Hi-Vex has a higher ABBE, is less expensive, and a little thinner at 1.56.

1.60 is 42 Abbe, Trivex has 43. 1.60 has much better cosmetics, is drill-able, and finishes very clean (no rough or chattery edges).

Between Hi-Vex and 1.60, who needs Trivex? It expensive and over rated in my opinion.

Well IMHO, I disagree. I am using trivex more and more where I might have used poly, like string mounts, but never 1.60, because it is too chip prone in these type frames, especially the ones with metal galleys.

B

[eyeGJ]

I usually use this as an RX guide when dispensing trivex.

http://www.youngeroptics.com/pdf/trilogy/Trilogy_Monograph.pdf


Ginny

[wrapthisRx]

Who's supplying Hi-vex? All styled lenses available?

[Uilleann]

Who's supplying Hi-vex? All styled lenses available?

There are two different flavors, recently discussed here. Don't know what/if any availability either offers to the market at large, as of today.

[sharpstick777]

I have never chipped a 1.60 in the newer resin, or cracked on on a drill. Very good tensile strength, and less chatter on the edge than Trivex, it finishes clean. How old was your 1.60? Both Silhoutte and Lindberg recommend 1.60 for drills over Trivex for these reasons.

Well IMHO, I disagree. I am using trivex more and more where I might have used poly, like string mounts, but never 1.60, because it is too chip prone in these type frames, especially the ones with metal galleys.

B

[Barry Santini]

MY ME finished trivex beautifully, without a polish. I prefer Trivex in string mounts since the client can't chip it.

B

[optical24/7]

I found many patients, even in low powers, were disappointed that Trivex was not that much thinner than CR-39.

The weight savings is great, the impact resistance is good. But Hi-Vex has a higher ABBE, is less expensive, and a little thinner at 1.56.

1.60 is 42 Abbe, Trivex has 43. 1.60 has much better cosmetics, is drill-able, and finishes very clean (no rough or chattery edges).

Between Hi-Vex and 1.60, who needs Trivex? It expensive and over rated in my opinion.

Have you ever inserted a magnet into a Hi-Vex power overlay? It does shatter if stressed by hand! Trivex is very, very difficult to shatter.

[kat]

LOVE Trivex! I have been useing it as my go to lens for over 10 years. See if you or you lab can finish them thinner when you need to. I still use 1.67 when the Rx and frame combo call for it. I do alot of 3 peice mounts and never have cracked lenses.

[sharpstick777]

Have you ever inserted a magnet into a Hi-Vex power overlay? It does shatter if stressed by hand! Trivex is very, very difficult to shatter.

We use the Chemistrie reading layers, which are Hi-Vex, and have not had any shatter. Is that what you mean? I will keep an eye out though. We are drilling on the Weco 580s, and we never have a lens crack on mounting.

Barry has the longest experience with Chemistrie though, we have only been using it since May.
Barry, have you shattered any of your Hivex layers?

[optical24/7]

I shattered the 1st 2 of them I made (Chemistrie) trying to make it a "tight" fit. Yes, it can shatter!