vision

Question 1

What is the orbit?

Answer 1

Cavity or socket of the skull which houses the eye

Question 2

What is the function of the orbit?

Answer 2

Protects and stabilizes the eye

Question 3

What is the superior orbital fissure?

Answer 3

Opening between lesser and greater wings of sphenoid bone

Question 4

What is the function of superior orbital fissure?

Answer 4

Allows cranial nerves, arteries, and veins to communicate with eye

Question 5

What is optic canal?

Answer 5

Foramen which the optic nerve passes to reach the brain

Question 6

Definition of eye

Answer 6

Slightly irregular, hollow sphere

Question 7

What are the three layers of the eye?

Answer 7

Fibrous, vascular, and inner layer

Question 8

What is in the fibrous layer of the eye?

Answer 8

Dense avascular - sclera and cornea

Question 9

What is in the vascular layer of the eye?

Answer 9

Choroid, ciliary bodies, iris

Question 10

What is in the inner layer of the eye?

Answer 10

Fluids (vitreous and aqueous humor) - shape and retina

Question 11

What are the functions of sclera?

Answer 11

Protects eye and gives shape

Question 12

What is sclera?

Answer 12

Is the white portion of the eye and is tough

Question 13

What is the pupil?

Answer 13

Opening in center of eye

Question 14

What is neurological function?

Answer 14

Pupils’ reaction to light

Question 15

Where is iris located in the eye?

Answer 15

Between cornea and lens (colored part of the eye)

Question 16

What is the function of the iris?

Answer 16

Contract and relax muscle and controls light levels inside eye

Question 17

What are the muscles in iris?

Answer 17

Sphincter and dilator muscle

Question 18

What is sphincter muscle?

Answer 18

Circular and contracts

Question 19

What is dilator muscle?

Answer 19

Radial and dilates

Question 20

What are the muscles of the eye?

Answer 20

Medial rectus, lateral rectus, superior rectus, inferior rectus, superior oblique, inferior oblique

Question 21

What is inferior rectus important for?

Answer 21

Depression, downward rotation, adduction

Question 22

What is superior rectus important for?

Answer 22

Elevation and upward rotation

Question 23

What is medial rectus important for?

Answer 23

Strongest muscles and adduction - towards the nose

Question 24

What is lateral rectus important for?

Answer 24

Abduction

Question 25

What is inferior oblique important for?

Answer 25

Elevation, adduction, and rotation of globe. Keeps the eyeballs level as head tilts.

Question 26

What is superior oblique important for?

Answer 26

Abduction, depression, rotation of globe. Keeps the eyeballs level as head tilts.

Question 27

What muscles is the oculomotor?

Answer 27

Inferior rectus, superior rectus, medial rectus, and inferior oblique

Question 28

What muscle is the abducens?

Answer 28

Lateral rectus

Question 29

What muscle is trochlear?

Answer 29

Superior oblique

Question 30

What is conjunctiva?

Answer 30

Transparent thin mucous membrane that covers the outer surface of the eye

Question 31

What is the function of conjunctiva?

Answer 31

Secretes oils and mucous that moisten and lubricates the eye

Question 32

Where is palpebral conjunctiva?

Answer 32

Lines eyelid

Question 33

Where is bulbar conjunctiva?

Answer 33

Anterior surface of eyeball

Question 34

Where is conjunctival sac?

Answer 34

Slit like space between the eyeball and eyelid

Question 35

What is cornea?

Answer 35

Transparent, dome-shaped window covering the front of the eye

Question 36

What is the function of the cornea?

Answer 36

Extremely sensitive and bends light in the eye

Question 37

What is the corneal reflex - blink reflex

Answer 37

Involuntary blinking of the eyelids elicited by stimulation of the cornea, or bright light

Question 38

What has no blood vessels?

Answer 38

Cornea

Question 39

What has a lot of blood vessels?

Answer 39

Choroid

Question 40

Where is choroid located?

Answer 40

Posterior opening for the optic nerve and dark brown membrane

Question 41

What is the vitreous humor

Answer 41

Holds retina in place via increased pressure

Question 42

What is aqueous humor?

Answer 42

Forms by filtration from capillaries in ciliary processes