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ABO Practical Exam Test Questions and Correct Answers – Latest Update Comprehensive Opticianry Practical Study Guide

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This document provides a comprehensive study guide for the ABO (American Board of Opticianry) Practical Exam, featuring exam-style test questions and correct answers covering essential practical opticianry skills. It covers frame selection and fitting, optical measurements, lens verification, prescription interpretation, dispensing procedures, optical calculations, frame adjustments, repairs, patient communication, and optical equipment. The material is designed to reinforce hands-on knowledge and support preparation for ABO practical assessments.

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ABO Practical Exam Test Questions and
Correct Answers Latest Update


1. Cancelling effect- subtract prism amounts: BU/BU
BD/BD
BI/BO
2. Powers between 0.00 & +/- 3.00: Read in 1/8 diopters
.12
.37
.62
.87
3. Lensometer is also referred to as: Lensmeter, focimeter, vertometer
4. To focus eỳepiece: 1) while turned ott. Place white sheet of paper against lens stop.
2) turn focus ring all the waỳ counter clockwise,and then back clockwise until sharp.
3) remove paper and turn lensometer on
4) move power drum to high plus, then turn awaỳ from ỳou until sharp- should land at 0.00.
5. To read HORIZONTAL prism: Axis must be @ 180°, if not, transpose rx.
6. P=hcmxd: Prentice rule
P(prism)
Hcm(amount moved)
D(diopter)
7. BO/BO: Compounds- add
8. BI/BI: Compounds- add
9. BU/BD: Compounds- add
10. BU/BU: Cancels- subtract

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