What is the correct order of how light passes through the eye?
A. Cornea, Lens, pupil, retina
B. Cornea, lens, vitreous fluid, retina
C. Lens, retina, cornea, optic nerve
D. Lens, vitreous fluid, optic nerve, retina - ANSWER B. Cornea, lens, vitreous fluid, retina
Vitreous fluid fills the space posterior to the lens
(Vitreous fluid fills the space posterior to the lens)
What sense does not have specialized sense organs?
A. Smell
B. Touch
C. Equilibrium
D. A&C - ANSWER B. Touch
The posterior portion of the outer fibrous layer of the eye is called the _____. - ANSWER
Sclera
What portion of the eye supplies blood supply to the other layers of the eye? - ANSWER
Choroid (of the middle layer)
True or false: The more numerous type of photoreceptors are rods. - ANSWER True
A patient had a CVA in the area indicated by the red x in the figure, below. What type of
blindness is the patient most likely to incur? Explain your reasoning. - ANSWER Bilateral
left visual field blindness
1
, The right optic tract is damaged. All the sensory information from the left visual fields travels
together after the optic chiasm to the right side of the brain.
A patient has a brain tumor in the area indicated by the red x in the figure, below. What type
of blindness is the patient most likely to incur? Explain your reasoning. - ANSWER Left
eye blindness
Left eye blindness because there is damage to the left optic nerve. Information from the left
visual field has not yet crossed at the optic chiasm. Both peripheral and nasal fields of the
left eye would be missing.
True or False: All sensory information from the optic nerves cross at the optic chiasm. - AN-
SWER False
(only medial fibers cross at optic chiasm)
The ________ is controlled by the trochlear nerve.
A. Superior rectus
B. Medial rectus
C. Lateral rectus
D. Superior oblique - ANSWER D. Superior oblique
Your elderly patient is discussing her vision problems. She describes her vision as blurry. Fol-
lowing a visual examination, her left eye deviates medially when looking straight ahead.
What is most likely causing the vision problem? Explain your reasoning.
A. Cataracts
B. Abducens nerve damage
C. Brain tumor in the occipital lobe
D. Medial rectus damageE. Superior rectus damage - ANSWER B
The abducens nerve controls the lateral rectus. Damage to the lateral rectus would cause
there to be a muscle imbalance, and the medial rectus would pull the eye medially when
looking straight ahead, causing blurry vision. (Diplopia)
2
A. Cornea, Lens, pupil, retina
B. Cornea, lens, vitreous fluid, retina
C. Lens, retina, cornea, optic nerve
D. Lens, vitreous fluid, optic nerve, retina - ANSWER B. Cornea, lens, vitreous fluid, retina
Vitreous fluid fills the space posterior to the lens
(Vitreous fluid fills the space posterior to the lens)
What sense does not have specialized sense organs?
A. Smell
B. Touch
C. Equilibrium
D. A&C - ANSWER B. Touch
The posterior portion of the outer fibrous layer of the eye is called the _____. - ANSWER
Sclera
What portion of the eye supplies blood supply to the other layers of the eye? - ANSWER
Choroid (of the middle layer)
True or false: The more numerous type of photoreceptors are rods. - ANSWER True
A patient had a CVA in the area indicated by the red x in the figure, below. What type of
blindness is the patient most likely to incur? Explain your reasoning. - ANSWER Bilateral
left visual field blindness
1
, The right optic tract is damaged. All the sensory information from the left visual fields travels
together after the optic chiasm to the right side of the brain.
A patient has a brain tumor in the area indicated by the red x in the figure, below. What type
of blindness is the patient most likely to incur? Explain your reasoning. - ANSWER Left
eye blindness
Left eye blindness because there is damage to the left optic nerve. Information from the left
visual field has not yet crossed at the optic chiasm. Both peripheral and nasal fields of the
left eye would be missing.
True or False: All sensory information from the optic nerves cross at the optic chiasm. - AN-
SWER False
(only medial fibers cross at optic chiasm)
The ________ is controlled by the trochlear nerve.
A. Superior rectus
B. Medial rectus
C. Lateral rectus
D. Superior oblique - ANSWER D. Superior oblique
Your elderly patient is discussing her vision problems. She describes her vision as blurry. Fol-
lowing a visual examination, her left eye deviates medially when looking straight ahead.
What is most likely causing the vision problem? Explain your reasoning.
A. Cataracts
B. Abducens nerve damage
C. Brain tumor in the occipital lobe
D. Medial rectus damageE. Superior rectus damage - ANSWER B
The abducens nerve controls the lateral rectus. Damage to the lateral rectus would cause
there to be a muscle imbalance, and the medial rectus would pull the eye medially when
looking straight ahead, causing blurry vision. (Diplopia)
2
