ABO Practical Exam 2023|37 Questions and
Answers- 100% Accurate.
Cancelling effect- subtract prism amounts - -BU/BU
BD/BD
BI/BO
-Powers between 0.00 & +/- 3.00 - -Read in 1/8 diopters
.12
.37
.62
.87
-Lensometer is also referred to as - -Lensmeter, focimeter, vertometer
-To focus eyepiece - -1) while turned off. Place white sheet of paper against lens stop.
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.
-To read HORIZONTAL prism - -Axis must be @ 180°, if not, transpose rx.
-P=hcmxd - -Prentice rule
P(prism)
Hcm(amount moved)
D(diopter)
-BO/BO - -Compounds- add
-BI/BI - -Compounds- add
-BU/BD - -Compounds- add
-BU/BU - -Cancels- subtract
-BD/BD - -Cancels- subtract
-BI/BO - -Cancels- subtract
Answers- 100% Accurate.
Cancelling effect- subtract prism amounts - -BU/BU
BD/BD
BI/BO
-Powers between 0.00 & +/- 3.00 - -Read in 1/8 diopters
.12
.37
.62
.87
-Lensometer is also referred to as - -Lensmeter, focimeter, vertometer
-To focus eyepiece - -1) while turned off. Place white sheet of paper against lens stop.
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.
-To read HORIZONTAL prism - -Axis must be @ 180°, if not, transpose rx.
-P=hcmxd - -Prentice rule
P(prism)
Hcm(amount moved)
D(diopter)
-BO/BO - -Compounds- add
-BI/BI - -Compounds- add
-BU/BD - -Compounds- add
-BU/BU - -Cancels- subtract
-BD/BD - -Cancels- subtract
-BI/BO - -Cancels- subtract
