Lab Eye (exam 4)

Question 1

Where is the superior rectus muscle?

Answer 1

On top of eye

Question 2

Where is the inferior rectus muscle?

Answer 2

Bottom of eye

Question 3

Where is the medial rectus muscle?

Answer 3

Muscle on the nose side

Question 4

Where is the lateral rectus muscle?

Answer 4

Other side of eyeball

Question 5

Where is the superior oblique muscles?

Answer 5

Attaches to superior rectus muscle that goes around next to nose

Question 6

Where is the inferior oblique muscles?

Answer 6

Wraps eye on the bottom

Question 7

What is the top eyelid called?

Answer 7

Superior palpebra

Question 8

What is the bottom eyelid called?

Answer 8

Inferior palpebra

Question 9

What is the muscle that pulls the top eyelid back?

Answer 9

Levator palpebrae superioris muscle

Question 10

What is the gland that gives tears that’s on the opposite side of what eye it is?

Answer 10

Lacrimal gland

Question 11

What empties in the lacrimal canal (where tears drain) and what side is it on?

Answer 11

Nasolacrimal duct

Medial side of nose

Question 12

What is the clear membrane covering the white part of the eye called?

Answer 12

Conjunctiva

Question 13

What is the white portion of the eye called and what else does it do?

Answer 13

Sclera

Holds eye in rigid place

Question 14

What is the cornea?

Answer 14

Transparent curved surface

Clear membrane on top of iris

Focuses Light

First place light bends

Question 15

What is the black layer under the sclera called?

Answer 15

Choroid

Light doesn’t jump around cornea because of this

Question 16

If the choroid is black and white in color what happens?

Answer 16

Black- Absorbs all colors of the rainbow

White- Reflects all colors of the rainbow

Question 17

What is the muscle called that holds the suspensory ligaments?

Answer 17

Ciliary muscle

Changes shape of lens

Question 18

What is the colored portion of the eye called?

Answer 18

Iris

Question 19

What is the muscle that causes the pupil to constrict and are parasympathetic?

Answer 19

Circular muscle

Question 20

What is the muscle that causes the pupil to dilate and are sympathetic?

Answer 20

Radial muscle

Question 21

What does the lens do?

Answer 21

Adjust to distance of objects like a microscope

Looks like a clear jelly bean

When you focus on something everything else gets blurry

Suspended by suspensory ligaments

Question 22

What holds the lens in place?

Answer 22

Suspensory ligaments

Question 23

What is the retina?

Answer 23

Light sensitive area where image is captured

Image is originally upside down

Question 24

What are rods?

Answer 24

Light sensitive

See black and white and different shades of gray

Pick up dim images

Around edges or retina (peripheral vision)

Question 25

What are cones?

Answer 25

See color red, blue and green Much less sensitive to light Blend the 3 colors to see other colors

Question 26

What is the yellow dot in the retina called?

Answer 26

Macula lutea

Question 27

What is the indent that the yellow dot makes called?

Answer 27

Fovea centralis Have sharpest vision here

Question 28

What is the optic disc?

Answer 28

A structure- causes Blind spot Function- optic nerve and blood vessels pass through

Question 29

What is a blind spot?

Answer 29

Spot where you can’t see anything Right over the optic nerve No light receptors Sides of eyes

Question 30

What cranial nerve is the optic nerve?

Answer 30

2

Question 31

What is the anterior cavity?

Answer 31

Everything in front of lens

Question 32

What is the anterior chamber?

Answer 32

Front of iris

Question 33

What is the posterior chamber?

Answer 33

Behind iris in front of lens

Question 34

What is the posterior cavity?

Answer 34

Behind lens

Question 35

What is the pupil?

Answer 35

Hole in front of lens Where light passes though Created by iris

Question 36

What drains aqueous humor if not drained there is a lot of pressure?

Answer 36

Canal of Schlemn (scleral venous sinus)

Question 37

What is lens accommodation mean?

Answer 37

Ability to focus and focus without moving

Question 38

What is convergence?

Answer 38

When both eyes follow and focus on an object

Question 39

What is astigmatism?

Answer 39

Irregularity in shapes of cornea

Question 40

What is color blindness?

Answer 40

Cones don’t work properly or have to many rods

Question 41

What is glaucoma?

Answer 41

Pressure under cornea because Cana of schlemn didn’t drain right

Question 42

What is emmetropia?

Answer 42

Normal vision

Question 43

What is hyperopia?

Answer 43

Light focused behind retina rather that on it Far sighted

Question 44

What is myopia?

Answer 44

Light goes in front of retina instead of on it Eyeball too long Cornea too curved Nearsighted

Question 45

What is presbyopia?

Answer 45

Lens loses flexibility and can’t focus on things Special kind of hyperopia

Question 47

What are photo receptors?

Answer 47

Like a pixel Single dot Brain puts them together to form an image

Question 49

What are the turnics of the eyeball?

Answer 49

3 layers of the eyeball | Retina Choroid Sclera Inside to outside