NBEO- Ocular Physiology Exam Questions
and Answers with Verified Solutions | Latest
Updated 2026
Is the Palpebral or Orbital portion Palpebral
of
the orbicularis oculi primarily
responsible for spontaneous
blinking?
The average rate of spontaneous 12-15 blinks per minute
blinking is approximately
_______________
blinks per minute.
Which of the following blink A and C
reflexes
are caused by CN 2 stimulation?
(Choose 2)
A) Dazzle
B) Cotton swab reflex
C) Menace
D) Loud noise
,Which of the following cranial D) CN 9
nerves
is NOT involved in reflex blinking?
A) CN 2
B) CN 5
C) CN 8
D) CN 9
Which of the following is the only B) Dazzle reflex
blink reflex that does NOT involve
input from the frontal lobe?
A) Menace reflex
B) Dazzle reflex
C) Loud noise reflex
D) Cotton swab reflex
Reflex blinking (Except Dazzle) Frontal lobe
initially stimulates which lobe of
the
brain?
Which portion of the orbicularis Palpebral
oculi is responsible for reflex and
spontaneous blinking? Palpebral
or
Orbital?
, Winking is a form of voluntary C) Both the palpebral and orbital portion of
blinking that requires which the
muscle orbicularis oculi
contraction?
A) Palpebral portion of orbicularis
oculi only
B) Orbital portion of orbicularis
oculi
only
C) Both the palpebral and orbital
portion of the orbicularis oculi
D) None of the above
Benign essential blepharospasm 1) Orbicularis oculi
results from spasms of which 3 2) Procerus
muscles? 3) Corrugator
Which of the following actions C) Forced eyelid closure
requires contraction of the orbital
portion of the orbicularis oculi?
A) Dazzle reflex
B) Spontaneous blinking
C) Forced eyelid closure
D) Menace reflex
__________________ is a normal Bell's phenomenon
defense
reflex present in about 75% of the
population and is characterized by
an upwards and outwards rotation
of
the globe following forced lid
closure.
and Answers with Verified Solutions | Latest
Updated 2026
Is the Palpebral or Orbital portion Palpebral
of
the orbicularis oculi primarily
responsible for spontaneous
blinking?
The average rate of spontaneous 12-15 blinks per minute
blinking is approximately
_______________
blinks per minute.
Which of the following blink A and C
reflexes
are caused by CN 2 stimulation?
(Choose 2)
A) Dazzle
B) Cotton swab reflex
C) Menace
D) Loud noise
,Which of the following cranial D) CN 9
nerves
is NOT involved in reflex blinking?
A) CN 2
B) CN 5
C) CN 8
D) CN 9
Which of the following is the only B) Dazzle reflex
blink reflex that does NOT involve
input from the frontal lobe?
A) Menace reflex
B) Dazzle reflex
C) Loud noise reflex
D) Cotton swab reflex
Reflex blinking (Except Dazzle) Frontal lobe
initially stimulates which lobe of
the
brain?
Which portion of the orbicularis Palpebral
oculi is responsible for reflex and
spontaneous blinking? Palpebral
or
Orbital?
, Winking is a form of voluntary C) Both the palpebral and orbital portion of
blinking that requires which the
muscle orbicularis oculi
contraction?
A) Palpebral portion of orbicularis
oculi only
B) Orbital portion of orbicularis
oculi
only
C) Both the palpebral and orbital
portion of the orbicularis oculi
D) None of the above
Benign essential blepharospasm 1) Orbicularis oculi
results from spasms of which 3 2) Procerus
muscles? 3) Corrugator
Which of the following actions C) Forced eyelid closure
requires contraction of the orbital
portion of the orbicularis oculi?
A) Dazzle reflex
B) Spontaneous blinking
C) Forced eyelid closure
D) Menace reflex
__________________ is a normal Bell's phenomenon
defense
reflex present in about 75% of the
population and is characterized by
an upwards and outwards rotation
of
the globe following forced lid
closure.
