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Wow, absolutely incredible responses. Some fantastic food for thought - thank you all so far.

Of all the aspects of opticianry that one should aim to master, frame selection seems to be the most difficult. I've read the excellent chapter in System for Ophthalmic Dispensing on frame selection,...

Congratulations! You have successfully broken my spirit:cry: I don't know that I've ever encountered anything like any of these. Nevertheless...



Since bifocals are prescribed, I will assume...

Thanks very much for your fantastic reply. The worst part about teaching yourself is that it's difficult to know what you don't know. Case studies like these and the input from people like yourself...

Of course, not sure why I kept dismissing the monocular aspect..



Absolutely, thanks very much!

Alright, I'll have a crack at this one. Seems easy enough, I feel like I'm missing something....

Going from -3.00D to -4.00D increases the cosmetic aspect of the new glasses, and perhaps this...

Robert, would you mind helping me understand some of your reasoning here? I'm positive that these recommendations are top notch, I just want to properly understand why.

Is the recommendation for...

Would you be willing to share some case studies from school? There are still a few of us on Optiboard that have heaps more to learn (myself very much included)!

Here's a case study/exam question I...

All it takes is two posts and the thread is completely derailed by petty argument? I believe Mr Baker was hoping for some thoughtful discussion.

That being said, I agree with Mr Santini in that...

Hi! Nice to meet you :)

Sounds like a great idea, there is much fun to be had in optical!

A very broad question. Is it from the point of view where you as a dispenser are given that Rx and have to brainstorm potential issues? If so then the obvious one is PD. Measuring the wrong PD will...

Absolutely, although it's strongly dependent on the individual, the Rx and the actual physical size of the lens. Obviously the larger the Rx and lens diameter, the more pronounced the effect. Since...

1.74 should be about 7% greater with any given manufacturer, if comparing plastic to plastic.

Edit: Sorry for the double post - bad connection.

About 7%. 1.74 having the higher value of course. This should be virtually identical between all manufacturers when dealing with plastic hi index.

You're correct. Given two lenses of the same index, an aspheric lens is able to utilise a flatter front curve to deliver a thinner overall profile compared to a standard "best form" lens. For...

Best avoid that fit if I can! Good advice on offering a second pair, I think she might appreciate that idea. Cheers!

I've ordered some of these to give them a go as well. Hopefully they aren't too bulky.

Thanks Dr Stacy, I've taken as much care as possible to do just as you say. From memory, the temples are not touching the head at any point until the top of the ear.



Great idea Paul, that...

Hi everyone,

I'm hoping to get some advice on what I might do next for this patient. She is an very elderly woman who is currently wearing progressives. She has no problems with her vision...

All we need now is a few more fun problems!

Something I'll have to keep in mind from here on out. Thanks!

Is the definition of "toric form" taken to be plus cylinder specifically? I only ask because I've never come across it in my studies at all, I've always take toric form to mean, well, just a toric...

Robert you are correct about the sphere curve. Plus cylinder lenses are ground with two curves on the front, minus cylinder with two curves on the back. The sphere curve is always the spherical...

I suppose it becomes impossible to unconditionally recommend the "right" material for this patient without knowing more. For instance, if this were a college student who frequently sits through...

You are not wrong. Theoretically, AR coatings do not help with chromatic aberration. If anything, it would be some kind of placebo effect - different people might think they prefer one or the other....