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When i joined OptiBoard i did so primarily for the technical discussions amongst professionals.

But most discussions around here turned out to be about politics which bring me personally little...

Yup it's a convenience to have those. We made them mandatory for our RXs and it saves a lot of headaches (ordering PALs with ADD power for 70 cm "refracted for PC" distance isn't fun :redface:).
...

Well not complete silence :ninja:

Here is quote about FramesDirect by PhiTrace from another thread :wink::

...

Fighting your competitors through legislation seems to be IN these days.
Doing all the work to be better then them is so old fashion.

I wonder if the onliners (Essilor and all) decide to flex...

Chris i appreciate all the work you do and the information you bring :happy:. I am sure many optiboarders feel the same way.



+1

There are other options as well:

3) Create a...

Some people here think the PD (a body measurement) is the thing that will stop people from purchasing glasses online.

So various schemes are thought out to keep this information from the...

Dave E, one more possibility :smile::

You can use the Zeiss Gradal Individual® Eyefit with the Intermediate design option.
...

PD is a body measurement. Like how tall one is.

It's simply the distance between the pupils.
What does responsibility got to do with it!?

A doctor measures how tall you are (5 feet).

Later...

What do you care if there is a PD on the RX?

Relax and if you don't need it, don't use it ... it's just 2 numbers on a peace of paper :smile:.

The optimal (in terms of anatomical comfort) gaze lowering needs to be considered when determining the placement of the near and intermediate zones.

To place the zones with the anatomical lowering...

I agree if they could make an informed decision. And choose the "adequate" option knowing of the compromises made.
But is that the case in reality and are the customers getting an accurate...

+1

BUT they have to put a big red banner on every page (like on the cigarette packages) stating:


Our glasses are NOT made with the state of the art technology!
They might only rise to a...

As far as i know the f360 SV is an RX optimized lens manufactured with a FreeForm process.
It uses standard POW parameters for the optimizations....

Tmorse, what are we disagreeing about :tongue:!?

You think 0.01 accuracy does not make a big difference? I agree. You reduce error by just 0.06 (maximum) when compared with 0.12D step RXs.

BUT...

"concentric rings" i too general.

Ask her to sketch what she sees on a piece of paper.

Also get more details, does she see them at close, medium or far distance.
Does she see them all the time...

Just long enough to pass my operating and servicing a manual lensmeter exams.

I had to use a manual lens meter during most of school as we started from grounds up (mandatory)... meaning hand...

A mechanical lens meter has moving parts.

Every moving part wears with time. Like in your car. And just like in your car, you don't replace parts every week but wear on parts does accumulate with...

We use the Nidek LM-1200PD and it does all of the above with ease.
Here is a brochure:
http://www.argusoptik.hu/pdf/lm_1200.pdf

And the manual:
www.marco.com/brochures/LM-1200_OME_Draft.pdf
...

Charan,
i don't trust mechanical lensmeters.

Parts wear out and they go out of calibration etc. [Current auto-lensmeters calibrate at every start up and have no moving measuring parts AFAIK ...

Thank you for the help :happy:.

On aspherics so far i have found "Ray tracing through a conicoid" in Chapter 21: Aspheric lenses (The principles of ophthalmic lenses).



Yup, that's the...

Base curve error in near view will be taken in account as well.
I want to calculate the real lens performance thus i will use real base curves (from a lens blanks catalog) and not ideal ones...

Shower Shock Caffeinated Soap for the win :cool:

https://www.thinkgeek.com/caffeine/accessories/5a65/

Cameras with audio :cool: :biggrin:

The boss in always there.

That's like saying you work with a great inquisitor :tongue:.

+1000

I can not up-vote this enough.

Eyeglasses and contacts are replaceable.
Mistakes, even the most ridiculous one cost only the price of a new pair.

And i am all for cataract surgery,...