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Its completely subjective and differences are so small to be almost immeasurable. The Hoya's and the Zeiss's use an "advanced asherical backside design".The Essilor 360 is an asheric SV blank cut on a digital generator. It's kind of like the Physio 360's and Ellipse 360. Having used all 3 i can tell you people are getting more bang for thier buck using the Hoya and Zeiss brands. I can't answer for sure if it actually does this, but the SV 360 could be considered free-form if on the back they compensated for cyl or base curve based on each unique RX.Its' not really new, Atoric lenses have been around since the Sola Spazio and the 2C Progressive and Zeiss Individual of the mid 90's.

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Currently Essilor has also dropped this from the marketing material, but if I see Jean Claude at Vision Expo East I will find out for sure. In terms of peripheral distortion, what's the difference between Essilor's 360 SV lens design and bi-aspheric lenses like Hoya's ID SV, Nikon's See Max SV, and Seiko's AZ SV lenses? Should Essilor 360 be characterized as bi-aspheric like other lenses explicitly are, or is it just a process applied to an aspheric lens to achieve a result similar to a bi-aspheric lens? If Essilor 360 is just a design process, than is it possible (and preferable) to get an Essilor 360 SV with a bi-aspheric lens? Not sure if Essilor makes a bi-aspheric lens, but I've heard the Lineis 1.74 is, can anyone confirm this? And finally, in terms of peripheral distortion, which solution achieves a better result, Essilor, Hoya, Nikon, Seiko, or another manufacturer? In terms of peripheral distortion, what's the difference between Essilor's 360 SV lens design and bi-aspheric lenses like Hoya's ID SV, Nikon's See Max SV, and Seiko's AZ SV lenses? Should Essilor 360 be characterized as bi-aspheric like other lenses explicitly are, or is it just a process applied to an aspheric lens to achieve a result similar to a bi-aspheric lens? If Essilor 360 is just a design process, than is it possible (and preferable) to get an Essilor 360 SV with a bi-aspheric lens? Not sure if Essilor makes a bi-aspheric lens, but I've heard the Lineis 1.74 is, can anyone confirm this? And finally, in terms of peripheral distortion, which solution achieves a better result, Essilor, Hoya, Nikon, Seiko, or another manufacturer? There is no advantage of Aspheric only compensations being split front to back just on its own.Seiko has patented MX dual aspheric design, where they combine a 10mm button with a full field aspheric design, which can be done of the front or back surface.The Essilor 360 is an asheric SV blank cut on a digital generator. It's kind of like the Physio 360's and Ellipse 360. Zeiss first coined the term Free-form in 1997 to describe only the atoric back curve of the first Individual.Although Shamir trademarked Free Form, they didn't invent it. Technology TM analyzes wavefront distortions (propagation of light) and corrects optical aberrations. Is it common or even legal (I'm in MA) for a doctor to do a drug screen before you get an Adderall script.I'm diagnosed with ADHD but I do other drugs, and smoke weed nightly.I've always wondered what they mean by that, if the asphericity, by design, abrubtly starts at the 5mm radius point, or that the need for compensation doesn't exist that close to the distance reference point. As for 360 Digital Surfacing TM, it generates the back of the lens point by point thereby optimizing the optical functions of each prescription. I think that the equivalent of the f360 SV Eye Code in America would be Essilor Fit™ Single Vision: Collec... Why does the lab manager at the lab say it's not a true freeform? Yes, its an issue not only for the Big E but here on Optiboard.I suspect the latter, and the marketing folks took it from there. I'm not that familar with all of E's lenses, but I believe that the Fit and Eyecode add POW optimizations. We have forgot the basic optical problems that Free-form tries to solve and gone straight to the frosting.I think the lab manager might know what he's talking about. There is a US site here I guess there is some sort of optimized backside. The 2 fundamental and original issues FF solves is the base curve limitations and oblique astigmatism caused by grinders The two are separate and distinct lens designs actually.Could it be that Essilor has a "New" 360 lens for the Europian market? Both the Fit and Eyecode lenses use POW measurements, however the Eyecode incorporates several additional variables than the more traditional panto, wrap & vertex of compensated lenses from Essilor and many others.

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