Hello, everyone I have been an optician for over 10 years, and I am having the most difficult time to the point where I need to ask some of you on here. I hate not knowing the why behind things, so I apologize if this question is basic or whatever. But, I have a DVX frame that states that the DBL is a 13mm imprinted on it. The lab that did the lenses made them saying the DBL was a 12.44, our tracer will tell me that it is a 12.9 and so on and so on, all around the 12-13 range. Now, my confusion is coming from me actually measuring the DBL, looking at it, Im getting a 16-17 range. Which, as you can imagine, is throwing my patient completely off. Can someone PLEASE explain, what is going on with this frame? The model is the DVX Next… I want to make her PD smaller now, to compensate for this 4(ish)mm difference, but if there is something that I am not seeing when measuring this DBL, that would be good to know as well… Unless it’s me not compensating for the bevel for it being a safety frame… Idk…. Thanks guys, hope everyone is doing good and pleasure to meet everyone.

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