ABO on Sun!

[Mermaid]

Hiya!
Just wanted you all to know that I've been reading lots and lots of great things on this Board that (I hope!!) will help me out a great deal this Sun. on the ABO!!

ANY more ABO pointers would be GREATLY appreciated!!

One day, I hope to be as proficient as you all are in Optics!! On my way!!

Thanks again!

[Darryl Meister]

It's been awhile since I've taken the test... But I would recommend being proficient in at least the following areas:

* Positions for measuring multifocals (e.g., pupil center for progressives, lower lid for bifocals, etc.)
* Measuring for distance/near/mono PDs
* How a prism works (e.g., bends light towards base and image towards apex)
* Prentice's rule (Prism = Decentration x Power / 10)
* Splitting prism between two eyes (e.g., 4 BU in OD = 2 BU in OD & 2 BD in OS)
* Basic lens styles (e.g., single vision, flat-top, executive-style, etc.)
* Basic frames styles (e.g., plastic/acetate, metal, nylon rimless, 3-pc rimless, etc.)
* ANSI Z80.1 Standard lens tolerances
* ANSI Z87.1 Standard safety tolerances
* FDA impact resistance requirements (e.g., 5/8" drop-ball dropped from 50"; record kept for 3 years)
* Converting back and forth from metric (e.g., 5 3/4" temple = 145 mm)
* Common refractive errors and terminology (e.g., myopia, hyperopia, presbyopia, anisometropia, etc.)
* Common pathological conditions (e.g., cataract, macular degeneration, etc.)
* Lenses used to correct errors (e.g., plus lens for hyperopia, slab-off for anisometropia, iseikonic lens for aniseikonia)
* Common lens treatments (e.g., tints, AR coatings, photochromics, etc.)
* Common frame adjustments (e.g., how to raise the frame using the pad/guard arms, how to bring one side closer to the face)
* Basic dispensing tools (e.g., lensometer, lens clock, pliers, etc.)
* Basic base curve theory (i.e., base curves are chosen to minimize peripheral lens aberrations such as oblique astigmatism)
* Thin lens formula (Power = Front Curve + Back Curve)
* Vocabulary -- You should at least be comfortable with the terms I've used here

Hope this helps! It's at least a good start. Good luck to you!

Best regards,
Darryl

[This message has been edited by Darryl Meister (edited 11-17-2000).]

[Mermaid]

Fantastic info!!
Thanks a TON!!!