The accuracy of eyewear is generally benchmarked by checking compliance with ANSI standards. And when the eyewear in question is found in compliance with these standards, it is branded as correct, accurate and well made. But the use of words like accurate and correct to describe eyewear is, IMHO, wrong.
There. I said it.
Wrong is a strong word. But now that I have your attention, let's step back look at the whole ANSI compliance-thing from a different perspective.
Your lab has little choice in following ANSI when you come down to it. All they have in front of them is your work order, the lens design selected and the frame involved. They *must* apply and follow ANSI because they have no other information to use when judging its quality.
But you, my dear dispenser, do.
- Their old Rx
- Their old lens design
- Their lens design's position
- Their old base curve
- Their old lens material
- Their Rx progression
- Their Rx delta
- Their expectations
The lab knows none of this. So dispensers have so much more available to them than a lab does with witch to judge the efficacy of the new eyewear.
When another optical judges an outside pair of glasses using ANSI, they're acting like a lab.
When an outside doc judges your eyewear using ANSI, they're acting like a lab.
Not that there is anything wrong with labs. But they are at least one tier down in sophistication when it comes to judging eyewear.
So please...don't act like a lab. You're powers to evaluate the quality of finished eyewear are far greater than that.