ABO Practice Test Study Questions
and Answers 2026 Update
To mount a lens in a nylon suspension type frame, it would be necessary to
_______ the lens.
a) Drill
b) Notch
c) Groove
d) V-Bevel -Correct Answer ✔-c
The optical center of a lens is:
a) At the geometrical center
b) One the 180 line
c) At the point where the "a" and "b" measurement meet
d) A lens location of zero deviation of the optical axis -Correct Answer ✔-d
The progressive power lens has a progressive zone after where power:
a) Gradually increases
b) Of the cylindrical increases
c) Stays the same
d) Abruptly changes -Correct Answer ✔-a
Standard transmissions in sunlenses should range between
a) 10% and 30%
b) 15% and 30%
c) 10% and 25%
d) 15% and 25% -Correct Answer ✔-b
OC placement verification is important to ensure:
,a) Accuracy of patient pd
b) Correct power of the add
c) That there is no unwanted prismatic effect
d) None of the above -Correct Answer ✔-c
Materials that best produce polarized light by reflectance are called:
a) Diatomic
b) Diametric
c) Dielectric
d) Diabolical -Correct Answer ✔-c
Coating lenses by depositing a metallic film such as magnesium floride on the
surface of a finished lens is done for the following reason:
a) Reducing light transmitted
b) Reducing reflections
c) Reducing weight
d) Reducing power -Correct Answer ✔-b
Aspheric lens surfaces are most commonly used with:
a) Lenses of low refractive power
b) Occluder lenses
c) High plus lenses
d) Sunglasses -Correct Answer ✔-b
The most commonly used prescription for correcting muscle imbalance in a case
of esotrophia would be:
a) Plus sphere
b) Minus cylinder
c) Base in prism
, d) Base out prism -Correct Answer ✔-d
The use of multifocal lenses is associated with:
a) Presbyopia
b) Astigmatism
c) Phoria
d) Tropia -Correct Answer ✔-a
When the optician advies the consumer as to the breakage of lenses, the risk of
injury should be described in terms of:
a) Impact resistance
b) Shatterproff
c) Lens inspection
d) Lens verification -Correct Answer ✔-a
When fitting progressive power lenses, certain critical measurements are taken,
one of the most important is the:
a) Lens size
b) Bridge size measurement
c) Monocular pupillary measurement
d) Temple length measurement -Correct Answer ✔-c
When using the boxing method to measure a lens, the "A" dimension refers to:
a) The longest diagonal measurement
b) The longest up and down measurement
c) The distance across the lens at the widest point
d) Twice the ED -Correct Answer ✔-c
Some characteristics of minus lenses include:
and Answers 2026 Update
To mount a lens in a nylon suspension type frame, it would be necessary to
_______ the lens.
a) Drill
b) Notch
c) Groove
d) V-Bevel -Correct Answer ✔-c
The optical center of a lens is:
a) At the geometrical center
b) One the 180 line
c) At the point where the "a" and "b" measurement meet
d) A lens location of zero deviation of the optical axis -Correct Answer ✔-d
The progressive power lens has a progressive zone after where power:
a) Gradually increases
b) Of the cylindrical increases
c) Stays the same
d) Abruptly changes -Correct Answer ✔-a
Standard transmissions in sunlenses should range between
a) 10% and 30%
b) 15% and 30%
c) 10% and 25%
d) 15% and 25% -Correct Answer ✔-b
OC placement verification is important to ensure:
,a) Accuracy of patient pd
b) Correct power of the add
c) That there is no unwanted prismatic effect
d) None of the above -Correct Answer ✔-c
Materials that best produce polarized light by reflectance are called:
a) Diatomic
b) Diametric
c) Dielectric
d) Diabolical -Correct Answer ✔-c
Coating lenses by depositing a metallic film such as magnesium floride on the
surface of a finished lens is done for the following reason:
a) Reducing light transmitted
b) Reducing reflections
c) Reducing weight
d) Reducing power -Correct Answer ✔-b
Aspheric lens surfaces are most commonly used with:
a) Lenses of low refractive power
b) Occluder lenses
c) High plus lenses
d) Sunglasses -Correct Answer ✔-b
The most commonly used prescription for correcting muscle imbalance in a case
of esotrophia would be:
a) Plus sphere
b) Minus cylinder
c) Base in prism
, d) Base out prism -Correct Answer ✔-d
The use of multifocal lenses is associated with:
a) Presbyopia
b) Astigmatism
c) Phoria
d) Tropia -Correct Answer ✔-a
When the optician advies the consumer as to the breakage of lenses, the risk of
injury should be described in terms of:
a) Impact resistance
b) Shatterproff
c) Lens inspection
d) Lens verification -Correct Answer ✔-a
When fitting progressive power lenses, certain critical measurements are taken,
one of the most important is the:
a) Lens size
b) Bridge size measurement
c) Monocular pupillary measurement
d) Temple length measurement -Correct Answer ✔-c
When using the boxing method to measure a lens, the "A" dimension refers to:
a) The longest diagonal measurement
b) The longest up and down measurement
c) The distance across the lens at the widest point
d) Twice the ED -Correct Answer ✔-c
Some characteristics of minus lenses include:
