Visual System Anatomy (2)

Question 1

What is the cornea involved in?

Answer 1

Light refraction

Question 2

What is the sclera?

Answer 2

Outer layers of posterior 5/6 of eye

Question 3

What is the iris?

Answer 3

Colored part of eye (smooth muscle)

Question 4

What does the pupil regulate?

Answer 4

Amount of light entering the eye

Question 5

Where is the lens suspended?

Answer 5

Between anterior and posterior chamber

Question 6

What are the posterior and anterior chambers called?

Answer 6

Aqueous humor

Question 7

What do the suspensory ligaments do?

Answer 7

Connect to the lens and help suspend it in place

Question 8

Where do the iris and suspensory ligaments attach?

Answer 8

Ciliary body

Question 9

What is the vascular layer of the eye called?

Answer 9

Choroid

Question 10

What is contained in the fibrous tunic?

Answer 10

Sclera and cornea

Question 11

What is contained in the vascular tunic?

Answer 11

Choroid, ciliary body, and iris

Question 12

What is contained in the nervous tunic?

Answer 12

Retina

Question 13

Where does the optic nerve send info to?

Answer 13

Optic chiasm

Question 14

What is the optic disc?

Answer 14

Back of the eye where axons are exiting the retina to form the optic nerve

Question 15

Why is the optic disc considered a blind spot?

Answer 15

It has no photoreceptors

Question 16

What happens to an image as it enters through the retina?

Answer 16

It is inverted and reversed

Question 17

Where does info from the upper visual space go to?

Answer 17

Lower retina

Question 18

Where does info from the lower visual space go to?

Answer 18

Upper retina

Question 19

Where does central fixation for each eye fall on to?

Answer 19

Fovea

Question 20

What does the retina contain?

Answer 20

Photoreceptors (rods and cones)

Question 21

Where is the retina located?

Answer 21

Outermost layer furthest away from lens

Question 22

What do photoreceptors respond to?

Answer 22

Light

Question 23

Where do photoreceptors synapse at?

Answer 23

Ganglion cells

Question 24

What are more numerous between rods and cones?

Answer 24

Rods (20:1)

Question 25

What do rods have?

Answer 25

Poor spatial/temporal resolution

Question 26

What do rods not detect?

Answer 26

Colors

Question 27

When do rods mainly function?

Answer 27

Low level light

Question 28

Where are cones highly represented at?

Answer 28

Fovea

Question 29

What do cones have?

Answer 29

High spatial and temporal resolution

Question 30

What do cones detect?

Answer 30

Color