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, focimeter, 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
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