Page 1 of 10 APII Module 3.pdf APII Module 3.pdf
Vision and the Eye
1. What are the five special senses?
Vision
Smell
Taste
Hearing
Equilibrium (balance)
2. What are the two parts of the outer layer of the eye?
Sclera
Cornea
3. What is included in the middle layer of the eye?
Choroid
Ciliary muscle
Iris
4.The pupil is a hole in the ____.
Center of the Iris
5.The inner sensory layer is the _____.
Retina
6.What are the two types of photoreceptors and their functions?
Photoreceptors are cells that are sensitive to light.
Rods – Stimulated in dim light
o More numerous
o More sensitive to light but do not produce sharp or color images
Cones – Stimulated in bright light
o Produce sharp color images
7.The interior of the eye (posterior to the lens) is filled with_____.
Vitreous fluid - helps hold the retina firmly to the choroid.
8.True or False: The vision pathway begins as the optic tracts, crosses at
the optic chiasm and then moves through the optic nerve.
False - Vision pathway begins with the optic nerve, crosses at the optic
chiasm, and continues as the optic tract.
9.Where is the LGN located?
A region in the thalamus where the optic tracts terminate
APII Module 3.pdf APII Module 3.pdf APII Module 3.pdf
, Page 2 of 10 APII Module 3.pdf APII Module 3.pdf
10. True or False: The nasal visual field is the visual field on the lateral
sides of each eye.
The nasal visual field is closer to the nose - the medial side of each eye,
The lateral side is considered the temporal visual field.
Vision and the Eye
11. What allows for 3-D vision?
Called Binocular Visual Field
Information overlap in the nasal visual fields
12. True or false: Only the medial fibers cross at the optic chiasm.
True
only the optic nerve's medial (nasal) fibers cross over, while the lateral
(temporal) fibers remain uncrossed.
13. The left side of the brain receives information from the _________ of
the left eye and the ________ of the right eye.
bilateral right visual fields
Medial
Lateral
14. On a piece of paper, draw the visual pathway using two different
colors. Note one comment below about what you learned about the vision
pathway:
The visual pathway of the lateral side of each eye overlaps to form binocular
vision
15. The medial rectus turns the eye _____. The medial rectus is
controlled by CN _____.
Medially
(Three) III
APII Module 3.pdf APII Module 3.pdf APII Module 3.pdf
Vision and the Eye
1. What are the five special senses?
Vision
Smell
Taste
Hearing
Equilibrium (balance)
2. What are the two parts of the outer layer of the eye?
Sclera
Cornea
3. What is included in the middle layer of the eye?
Choroid
Ciliary muscle
Iris
4.The pupil is a hole in the ____.
Center of the Iris
5.The inner sensory layer is the _____.
Retina
6.What are the two types of photoreceptors and their functions?
Photoreceptors are cells that are sensitive to light.
Rods – Stimulated in dim light
o More numerous
o More sensitive to light but do not produce sharp or color images
Cones – Stimulated in bright light
o Produce sharp color images
7.The interior of the eye (posterior to the lens) is filled with_____.
Vitreous fluid - helps hold the retina firmly to the choroid.
8.True or False: The vision pathway begins as the optic tracts, crosses at
the optic chiasm and then moves through the optic nerve.
False - Vision pathway begins with the optic nerve, crosses at the optic
chiasm, and continues as the optic tract.
9.Where is the LGN located?
A region in the thalamus where the optic tracts terminate
APII Module 3.pdf APII Module 3.pdf APII Module 3.pdf
, Page 2 of 10 APII Module 3.pdf APII Module 3.pdf
10. True or False: The nasal visual field is the visual field on the lateral
sides of each eye.
The nasal visual field is closer to the nose - the medial side of each eye,
The lateral side is considered the temporal visual field.
Vision and the Eye
11. What allows for 3-D vision?
Called Binocular Visual Field
Information overlap in the nasal visual fields
12. True or false: Only the medial fibers cross at the optic chiasm.
True
only the optic nerve's medial (nasal) fibers cross over, while the lateral
(temporal) fibers remain uncrossed.
13. The left side of the brain receives information from the _________ of
the left eye and the ________ of the right eye.
bilateral right visual fields
Medial
Lateral
14. On a piece of paper, draw the visual pathway using two different
colors. Note one comment below about what you learned about the vision
pathway:
The visual pathway of the lateral side of each eye overlaps to form binocular
vision
15. The medial rectus turns the eye _____. The medial rectus is
controlled by CN _____.
Medially
(Three) III
APII Module 3.pdf APII Module 3.pdf APII Module 3.pdf
