ABO Practice Test(Questions and Answers 100%
correct)
Terms in this set (404)
When discussing thick d. front curve, back curve, thickness and index
lenses, the factors which
are considered in
computing the lens power
are:
a. front curve, thickness
and index
b. back curve, thickness
and index
c. front curve, back curve
and thickness
d. front curve, back curve,
thickness and index
Toric transposition shows: b. power in principal meridians
a. lens thickness
b. power in principal
meridians
c. the power of the ADD
d. the lens diameter
,Increasing the diameter of c. weight
a minus power lens always
increases its:
a. vertex power
b. center thickness
c. weight
d. refractive index
The optical center of a b. in the geometric center of the segment
round segment is located:
a. at the very top of the
segment
b. in the geometric center
of the segment
c. 5 mm from the top of
the segment
d. at the very bottom of
the segment
The base curve of any c. segment
multifocal lens is found on
the surface containing the:
a. cross curve
b. cylinder surface
c. segment
d. ocular curve
,Normal slab-off (bicentric c. least plus power
grind) is ground on the
lens whose vertical
meridian has the:
a. strongest curves
b. most plus power
c. least plus power
d. least minus power
The refractive error d. mixed astigmatism
indicated by the Rx +1.75
-2.75 x 090 is:
a. compound hyperopic
astigmatism
b. compound myopic
astigmatism
c. simple myopic
astigmatism
d. mixed astigmatism
Tempering a lens by heat b. more resistant to impact
treating results in a lens
being:
a. less resistant to impact
b. more resistant to impact
c. more resistant to
surface scratching
d. impossible to break
, A slab-off lens is for the c. excessive prism imbalance at the reading level
correction of:
a. astigmatic errors
b. excessive weight of lens
c. excessive prism
imbalance at the reading
level
d. exotropia
Chem-tempering makes a a. ion exchange
glass lens more impact
resistant by placing the
lens in a potassium nitrate
bath. The lens undergoes
a process known as:
a. ion exchange
b. iron oxide activation
c. silver halide transfer
d. thermal bleaching
Which wavelengths of c. 350-400 nm
light have been indicated
as possible contributors to
the onset of cataracts?
a. 400-520 nm
b. 520-635 nm
c. 350-400 nm
d. 635-750 nm
correct)
Terms in this set (404)
When discussing thick d. front curve, back curve, thickness and index
lenses, the factors which
are considered in
computing the lens power
are:
a. front curve, thickness
and index
b. back curve, thickness
and index
c. front curve, back curve
and thickness
d. front curve, back curve,
thickness and index
Toric transposition shows: b. power in principal meridians
a. lens thickness
b. power in principal
meridians
c. the power of the ADD
d. the lens diameter
,Increasing the diameter of c. weight
a minus power lens always
increases its:
a. vertex power
b. center thickness
c. weight
d. refractive index
The optical center of a b. in the geometric center of the segment
round segment is located:
a. at the very top of the
segment
b. in the geometric center
of the segment
c. 5 mm from the top of
the segment
d. at the very bottom of
the segment
The base curve of any c. segment
multifocal lens is found on
the surface containing the:
a. cross curve
b. cylinder surface
c. segment
d. ocular curve
,Normal slab-off (bicentric c. least plus power
grind) is ground on the
lens whose vertical
meridian has the:
a. strongest curves
b. most plus power
c. least plus power
d. least minus power
The refractive error d. mixed astigmatism
indicated by the Rx +1.75
-2.75 x 090 is:
a. compound hyperopic
astigmatism
b. compound myopic
astigmatism
c. simple myopic
astigmatism
d. mixed astigmatism
Tempering a lens by heat b. more resistant to impact
treating results in a lens
being:
a. less resistant to impact
b. more resistant to impact
c. more resistant to
surface scratching
d. impossible to break
, A slab-off lens is for the c. excessive prism imbalance at the reading level
correction of:
a. astigmatic errors
b. excessive weight of lens
c. excessive prism
imbalance at the reading
level
d. exotropia
Chem-tempering makes a a. ion exchange
glass lens more impact
resistant by placing the
lens in a potassium nitrate
bath. The lens undergoes
a process known as:
a. ion exchange
b. iron oxide activation
c. silver halide transfer
d. thermal bleaching
Which wavelengths of c. 350-400 nm
light have been indicated
as possible contributors to
the onset of cataracts?
a. 400-520 nm
b. 520-635 nm
c. 350-400 nm
d. 635-750 nm
