2024 ABO Practice Exam (ACTUAL EXAM ) Questions and Answers (Solved)

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1. Cancelling effect- subtract prism amounts Answer: BU/BUBD/BD BI/BO 2. Powers between 0.00 & +/- 3.00 Answer: Read in 1/8 diopters 3. Lensometer is also referred to as Answer: Lensmeter, focime... ter, vertometer 4. To focus eyepiece Answer: 1) while turned off. Place white sheet of paper against lensstop. 2) turn focus ring all the way counter clockwise, and then back clockwise until sharp. 3) remove paper and turn lensometer on 4) move power drum to high plus, then turn away from you until sharp- should land at 0.00. 5. To read HORIZONTAL prism Answer: Axis must be @ 180°, if not, transpose rx. 6. P=hcmxd Answer: Prentice ruleP(prism) Hcm(amount moved)D(diopter) 7. BO/BO Answer: Compounds- add 8. BI/BI Answer: Compounds- add 9. BU/BD Answer: Compounds- add 10. BU/BU Answer: Cancels- subtract 11. BD/BD Answer: Cancels- subtract 12. BI/BO Answer: Cancels- subtract 13. Black numbers on lensometer power drum Answer: (+) 14. Red numbers on lensometer power drum Answer: (-) 15. When neutralizing, if you have a power that is in 1/8 diopters and need to subtract Answer: Add 1 to 1/8 amount Ex. .12, you would need to subtract .13 [Show More]

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