ABO Practical Exam (Latest 2026/2027 Update)
Complete Questions and Guide Answers, 100%
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Practice questions for this set
Learn 1 /7 Study with Learn
Used to measure near PD. About 16 inches
Choose an answer
Cancelling effect- subtract prism
1 Pupillometer set @ 40cm 2
amounts
Black numbers on lensometer
3 4 To read HORIZONTAL prism
power drum
Don't know?
Terms in this set (37)
, Cancelling effect- subtract prism BU/BU
amounts 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
Complete Questions and Guide Answers, 100%
Verified Graded A+
Save
Practice questions for this set
Learn 1 /7 Study with Learn
Used to measure near PD. About 16 inches
Choose an answer
Cancelling effect- subtract prism
1 Pupillometer set @ 40cm 2
amounts
Black numbers on lensometer
3 4 To read HORIZONTAL prism
power drum
Don't know?
Terms in this set (37)
, Cancelling effect- subtract prism BU/BU
amounts 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
