http://essilorusa.com/content/essilo...ectSystem.html
What sorcery is this? Blue blocking technology embedded in the very fabric of the material?
http://essilorusa.com/content/essilo...ectSystem.html
What sorcery is this? Blue blocking technology embedded in the very fabric of the material?
Interesting ..........................
To address the growing need for protection against increasing exposure to blue light and UV, Essilor, the leading manufacturer of eyeglass lenses, is introducing Eye Protect System™, a lens innovation making eye protection more accessible to everyone. This includes the launch of Smart Blue Filter™ which provides embedded protection against harmful blue-violet light while allowing the beneficial blue-violet light to pass through on an aesthetically clear lens.
Only 2 weeks to find out what it is and if we had it already 20 years ago with a simple tinting job, doing the same thing.
Old news being passed off as an innovation by Essilor. Mitsui has a product like this. TheraBlue is like this.
I'm Andrew Hamm and I approve this message.
Since when is some blue-violet good and some bad? I thought that entire part of the spectrum was bad since its all high-energy? Where is the cut-off?
Yeah, that tells me absolutely nothing, there is no demarcation between Blue-Violet that is bad, and Blue-Violet that is ok. If you're trying to say UV, UV is not violet, which is why it has a completely different name from violet. Comparing UV and violet is like comparing sonic and ultrasonic, completely different things.
It depends upon how you are defining "bad". Light below 420 nm may cause some eye strain, but is relatively low in terms of the blue light hazard function. Light around 435 nm is potentially the most damaging. And light around 460 nm is deemed "good" because of its relationship to the circadian rhythm. Of course, if your goal is to reduce 460 nm exposure at night for the kiddies reading their iPad in bed, then 460 nm might not be as good as it is in the middle of the day.
RT
It's in the monomer. They have developed the stuff Connant has had for months. http://www.visionmonday.com/technolo...s-launches-uv/
The new Varilux is actually the Transitions without getting darker; they discovered in the un-active state it blocks blue light. You now have a new product but where does it benefit to then use Provencia? They like to confuse us and it works.
Craig
That is on contact lenses containing a (yellowish) UV400 absorber.
For eyeglass lenses that was the novelty in the early 1980's when lens manufacturers all came out with the UV 400 absorbing lenses at much higher prices.
Lens dye suppliers then came out with UV 400 solutions with which the optician could apply in his/her on site lab in the dye pot for a fraction of the cost of these lenses. Through the yellowish tinge it absorbs just about to the 420 nm level.
These UV solutions are still available today, and might just come back into fashion for a new reason, and save money to the retailer. The best and easiest lens material for this application is CR39.
Then some dye suppliers came out with the non yellowish UV absorber for the dye pot which is non yellowish but only absorbs up to 382 nm. Polycarbonate lenses also contain a UV absorber, but that stops at 382 nm.
So Essilor has reinvented another "deja vue".
From what they told us in January, using this with Crizal Prevencia, it blocks more blue light. If I recall correctly, when used individually, they both block around 20%. When used together, the protection increases to 35%. If you want the best protection, using Transitions XtrActive with Prevencia will get you to 45%.
The essilor announcement is some evidence that they have come to their senses and see the need to put the blue blocking in the lens instead of on the lens. They are still recommending their Prevencia be combined with blue absorption, but it is only months, not years from now that they will completely see the light and drop Prevencia all together. I'm quite sure they now know that back side blue sources are reflected and concentrated FROM THE FRONT SURFACE COATING into the eye. Just a matter of time. How embarrassing it will be for them when they make THAT announcement. Of course the same thing can be said about all the major blue reflectors.
No Ophthalmic lenses. http://www.uvplusplus.com/availability.html
Hi-Vex® +6.00 to -10.00 Super Hydrophobic AR
1.60 MR-95 +6.00 to -10.00 Super Hydrophobic AR
1.67 MR-10 +6.00 to -12.00* Super Hydrophobic AR *Extended Cylinders Available
Semi Finished Base Curve Diameter
Hi-Vex® .50/1/2/3/4/5/6/7/8/9/10 75mm
1.60 MR-95 1/2/3/4/5/6/7/8/9/10 75mm
1.67 MR-10 1/2/3/4/5/6/7/8/9/10 75mm
With all the big E gibberish it seems that they (BIG E) is still confused about the blue "problem".
Speed...............When you click on the link you posted, check the title which I copied right below.
TECHNOLOGY: Contact Lenses
Connant Lens Launches UV++
It is also an old way of doing as in 1982, as I described it in my above post number 10.
UV absorber in the monomer first and then opticians got UV400 absorbers for the dye pot and did what i did describe also above.
Last edited by Chris Ryser; 03-16-2016 at 10:54 AM.
Yup.
Yes sir.
Right.
The invention is from Mitsui Chemicals, I think. Maybe licensed to the above manufacturers. Dyes and coatings for UV/blue/violet will now mostly become obsolete.
http://www.mitsui-chem.co.jp/special...iew_v05_en.pdf
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.
Completely clear blue blocker from Vision-Ease came out called "Clear Blue Filter" are all these the same thing?
~ Erin
ABOC
Maybe it would be interesting for anybody to learn about visible colors and more. A most interesting section on it can be found:
What Wavelength Goes With a Color?
see at: =============>
http://science-edu.larc.nasa.gov/EDD...or_Colors.html
Check it out and then tell us how would you neutralize a visible blue color with a clear, non visible tinted lens.
Better Things for Better Living...through Chemistry.
http://www.google.com/patents/CN103465418A?cl=en
"Under the condition that the long-wave light transmissivity of the lens is rarely changed, the blue light prevention performance of the lens is improved."
"The object of the present invention is to solve problems of the prior art, to provide a minimal change in the case of long wavelength light transmittance, improvement of anti-blue resin lens performance…"
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.
Congratulations Robert..............superb information and even translated from Chinese to English.
I have followed your lead because of my own interest in this matter and have found the registered patent:
* Cited by examiner
Citing Patent Filing date Publication date Applicant Title CN103992422A * Jun 4, 2014 Aug 20, 2014 江苏华天通纳米科技有限公司 Anti-blue light nanometer composite monomer material and anti-blue light optical resin prepared from same
ABSTRACT
The invention relates to a blue light cut nano compound resin material and lens and a manufacturing method thereof. The blue light cut nano compound resin material comprises macromolecule resin as well as core-shell type transition metal oxide nano particles and an ultraviolet light absorber which are dispersed in the macromolecule resin, wherein the core-shell type transition metal oxide nano particles account for 0.2-2% of the total weight of the resin, and the ultraviolet light absorber accounts for 0.5-5% of the total weight of the resin; particle size of nano particles is 20-50nm; the shell is a surface active agent, and thickness is 3-10nm; the nano particles and the ultraviolet light absorber are fully dispersed in a macromolecule monomer, and a prepolymerization and secondary polymerization technological process is carried out, so that the blue light cut compound resin material is obtained. The manufacturing method of the blue light cut compound resin material is simple in technology and good in reproducibility, the manufactured resin material and lens can efficiently and permanently shield high energy harmful blue light and ultraviolet light with wavelength within the range of 380-450nm, vision is clear and colour vision is soft under strong and weak light environments respectively, and the blue light cut compound resin material has excellent overall performance.
see all of it: ==========>
http://www.google.com/patents/CN103980643A?cl=en
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