ABO Practice Test Comprehensive
Questions (Frequently Tested) with
Verified Answers Graded A+
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 - 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 - 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 - 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% - 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 - Answer: c
Materials that best produce polarized light by reflectance are called:
a) Diatomic
b) Diametric
c) Dielectric
d) Diabolical - 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 - 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 - 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 - Answer: d
The use of multifocal lenses is associated with:
a) Presbyopia
b) Astigmatism
c) Phoria
d) Tropia - 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 - 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 - 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 - Answer: c
Some characteristics of minus lenses include:
a) Magnifies images, converge light rays images, power weakens as vertex shortens
b) Minifies images, diverges light rays images, power strengthens as vertex shortens
c) Magnify images, diverges light rays images, power strengthens as vertex shortens
d) Minifies images, diverges light rays images, power weakens as vertex shortens - Answer: b
Questions (Frequently Tested) with
Verified Answers Graded A+
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 - 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 - 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 - 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% - 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 - Answer: c
Materials that best produce polarized light by reflectance are called:
a) Diatomic
b) Diametric
c) Dielectric
d) Diabolical - 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 - 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 - 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 - Answer: d
The use of multifocal lenses is associated with:
a) Presbyopia
b) Astigmatism
c) Phoria
d) Tropia - 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 - 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 - 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 - Answer: c
Some characteristics of minus lenses include:
a) Magnifies images, converge light rays images, power weakens as vertex shortens
b) Minifies images, diverges light rays images, power strengthens as vertex shortens
c) Magnify images, diverges light rays images, power strengthens as vertex shortens
d) Minifies images, diverges light rays images, power weakens as vertex shortens - Answer: b
