NBEO Practice Questions and Answers

NBEO Practice Questions and Answers

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Terms in this set (48)


A +7.00 D lens has a real A
object located 20 cm from
the lens. The conjugate
image is:


a. real and located 50 cm
from the lens
b. virtual and located 50
cm from the lens
c. real and located 8.30
cm from the lens
d. virtual and located 8.30
cm from the lens
e. real and located 14.30
cm from the lens

,A lens is made of glass A
with a refractive index of
1.65. What would be the
refractive index for the
ideal anti-reflection
coating?


a. 1.28
b. 1.34
c. 1.41
d. 1.49
e. 1.65

An eye under the C
influence of an extremely
strong miotic agent has a
pupil diameter of 1 mm.
The resolution of this eye
is considered to be limited
by:


a. radial astigmatism
b. coma
c. diffraction
d. spherical aberration
e. depth of focus

, The Jackson crossed B
cylinder subjective test is
begun with a -1.00 -1.75 x
090 lens in front of a
patient's eye. If the
correcting cylinder power
is changed to -0.75 x 090,
then the spherical power
should now be:


a. -2.00 DS
b. -1.50 DS
c. -1.00 DS
d. -0.50 DS
e. +0.50 DS

A 53-year-old male B
complains of occasional
blur at distance and near.
His visual acuities are
20/30 in each eye at
distance and near with his
present lens correction of
+1.00 DS OU, Add +1.75 D.
Your distance refraction
for 20/20+ acuity is +1.50
DS OU. The BEST tentative
Add for the new
prescription will have a
power of:


a. +1.25 D
b. +1.75 D
c. +2.25 D
d. +2.50 D