ABO PRACTICAL EXAM ACTUAL QUESTIONS
AND SOLUTIONS COMPLETE STUDY GUIDE
◉ 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) Reducing reflections
◉ 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) Occluder lenses
,◉ 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) Base out prism
◉ The use of multifocal lenses is associated with:
a) Presbyopia
b) Astigmatism
c) Phoria
d) Tropia.
Answer: a) Presbyopia
◉ 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) Impact resisitance
◉ 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) Monocular pupillary measurement
◉ 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) The distance across the lens at the widest point
, ◉ 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) Minifies images, diverges light raysimages, power
strengthens as vertex shortens
◉ What is the advantage of a short corridor progressive design>
a) It allows the use of shallow "B" measurement frames
b) It creates asymmetrical design which puts less surface
astigmatism in the temporal portion of the lens
c) It helps the designer use the maximum amount of asphericity
from the top to the bottom of the lens
d) They are less expensive to make because the corridor is shorter
and therefore requires less production costs.
Answer: a) It allows the use of shallow "B" measurement frames
AND SOLUTIONS COMPLETE STUDY GUIDE
◉ 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) Reducing reflections
◉ 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) Occluder lenses
,◉ 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) Base out prism
◉ The use of multifocal lenses is associated with:
a) Presbyopia
b) Astigmatism
c) Phoria
d) Tropia.
Answer: a) Presbyopia
◉ 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) Impact resisitance
◉ 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) Monocular pupillary measurement
◉ 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) The distance across the lens at the widest point
, ◉ 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) Minifies images, diverges light raysimages, power
strengthens as vertex shortens
◉ What is the advantage of a short corridor progressive design>
a) It allows the use of shallow "B" measurement frames
b) It creates asymmetrical design which puts less surface
astigmatism in the temporal portion of the lens
c) It helps the designer use the maximum amount of asphericity
from the top to the bottom of the lens
d) They are less expensive to make because the corridor is shorter
and therefore requires less production costs.
Answer: a) It allows the use of shallow "B" measurement frames
