Orbit

Question 1

From anterior to posterior of eyeball

Answer 1

Cornea, Iris=pupil, lens, retina, optic n.

Question 2

two comparatively thick, elongated plates of dense connective tissue, about 2.5 cm (1.0 in) in length; one is found in each eyelid, and contributes to its form and support.

Answer 2

Tarsal Plate

Question 3

Orbital Septum

Answer 3

The orbital septum is a membranous sheet that acts as the anterior boundary of the orbit. It extends from the orbital rims to the eyelids. It forms the fibrous portion of the eyelids

Question 4

does dos the nasolacrimal duct lead?

Answer 4

inferior meatus of nasal cavity

Question 5

Oculomotor paralysis

Answer 5

lateral rectus and superior oblique still work so eyes are looking down and to the side

Question 6

Tarsal Plate

Answer 6

are two comparatively thick, elongated plates of dense connective tissue, about 2.5 cm (1.0 in) in length; one is found in each eyelid, and contributes to its form and support.

Question 7

Conjunctiva

Answer 7

mucous membane that covers the eyelids and is reflected onto the eyeball

Question 8

Sclera

Answer 8

outer fascia of eye that is continuous with dura mater of optic n.

Question 9

a membranous sheet that acts as the anterior boundary of the orbit.

Answer 9

Orbital Septum

Question 10

Lines of reflection of palpebral conjunctiva onto the eyeball form deep recesses called _______

Answer 10

fornices

Question 11

Position of lacrimal gland in orbit

Answer 11

Superior, anterior, lateral

Question 12

Inferior rectus actions

Answer 12

away depression, adducts and extorsion

Question 13

Lacrimal caruncle

Answer 13

located just lateral of lacrimal lack, involved in tear collection

Question 14

What is in the optic cavity?

Answer 14

nerves arteries fat (to push out eye and keep it in place)

Question 15

Superior rectus actions

Answer 15

always elevates but also adducts and intorts the eye

Question 16

Lacrimal Canaliculis

Answer 16

Commence at a lacrimal punctum on the lacrimal papilla, near medial angle of eye and drain lacrimal fluid into lacrimal lake.

Question 17

Abducens lesion

Answer 17

lateral rectus is not opposing the contraction of the medial rectus

Question 18

outer fascia of eye that is continuous with dura mater of optic n.

Answer 18

sclera

Question 19

what runs in the tendinous ring?

Answer 19

Optic N. Ophthalmic a

Question 20

what drains into the nasolacrimal sac

Answer 20

lacrimal canaliculus

Question 21

Human vs. chimps orbits

Answer 21

Chimps are squatting with their eyes oriented forward, but if they are standing their eyes are facing upward. Human orbits have shifted inferiorly so we are looking straight while we are upright

Question 22

triangular space at medial angle of eye where tears collect

Answer 22

Lacrimal lake

Question 23

What nerves run with the superior ophthalmic vein?

Answer 23

V-Frontal, IV, V lacrimal

Question 24

Lacrimal gland

Answer 24

secretes lacrimal fluid that moistens and lubricates surface of conjunctiva and cornea, provides nutrients and dissolved O2. when produced in excess, makes tears

Question 25

Lateral to lacrimal lakes, tear collection

Answer 25

lacrimal caruncle

Question 26

What nerves are in the orbit?

Answer 26

V (frontal and lacrimal, nasociliary) IV - trochlear III (Superior and inferior ramus of oculomotor) VI- abducens,

Question 27

Ducts of lacrima gland

Answer 27

lots of small little ducts that drain into the superior phronyx - the lining of the lid that is reflected onto the conjuctiva of the eye.

Question 28

Lacus lacrimalis

Answer 28

triangular space at medial angle of eye where tears collect

Question 29

junction of superior and inferior eyelids

Answer 29

palpebral commisures

Question 30

Superior oblique actions

Answer 30

abduction, depression, intorsion

Question 31

Inferior oblique actions

Answer 31

abduction, elevation, extorsion

Question 32

Medial palpebral lig

Answer 32

connects tarsi to the medial margin of orbit orbicularis oculi inserts into this ligament

Question 33

Lacrimal lake

Answer 33

are blinking, tears are swept across the cornea to gather here where they drain into the lacrimal canaliculus

Question 34

Fornices in the orbit

Answer 34

Lines of reflection of palpebral conjunctiva onto the eyeball form deep recesses Superior and lateral

Question 35

what muscles in the eye are normally contracted for steroscopic vision?

Answer 35

Medial rectus adducts the eye from its natural position to move the visual field more forward.