Originally Posted by
erichwmack
Geez, sounds like there a lot of jaded opticians out there about lens and their benefits and the reps. I agree some reps, especially new reps, will almost over sell their products. But everything they tell you can be verified by the lens white papers (technical analysis). Your rep can provide these to anyone who asks. Experienced reps will automatically go into these details to the opticians that understand lens optics. And most reps I know are not just trying to push products to line their own pockets. There are clear and distinct benefits of free form designs. We have almost exclusively been fitting our patients with free form products (SV, prog). The benefits come from reducing wavefront higher order aberrations (coma, spherical, barrel, pincushion, chromatic) that are present in conventional lens designs. Conventional lenses have always been subject to these higher order aberrations but it was just the best we could do. Aspheric front surfaces were developed to correct these aberrations somewhat and improved on this problem. Then free form came around and gave full flexibility to front and back surfaces curve designs with the intention of further reducing wave front aberrations. These aberrations become an issue with busy lenses like progressive, higher power +/- 3D, high wraps, and also the pupil size. A dilated pupil (night driving) lets in more of the wavefront and because the aberrations lie on the outer edge of a wavefront the vision deteriorates. So clearly there is a benefit for many people using free form. It is a personal responsibility to get accurate and detailed product knowledge in my opinion. It can only help sales. The sales manager should really train everyone on this topic if he/she expects people to sell it.
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