Ocular Anatomy - Lab 3 Summary of Structures

Question 1

medial canthus

Answer 1

Joining of the eyelids next to the nose

eyelids are in direct contact with the lacrimal lake NOT the eyeball

Question 2

lateral canthus

Answer 2

joining of the eyelids closest to the ear

eyelids are in direct contact with the eyeball

Question 3

superior palpebral suclcus

Answer 3

groove above the eyelid

formed by the insertion of the aponeurosis of LPS into the skin of the upper eyelid

Question 4

plica semilunaris

Answer 4

folds of bulbar conjunctiva
forms the floor of the lacrimal lake
directly lateral to the caruncle
allows the eyeball to move fully lateraly without stretching the bulbar conj

Question 5

caruncle

Answer 5

small pinkish elevation of modified skin in the lacrimal lake
may have fine hairs that are normally present

Question 6

lacrimal lake

Answer 6

shallow trianular region or space between the medial canthus and the eyeball
where tears collect

Question 7

tear meniscus

Answer 7

a strip of tear film at the junction of the upper and lower eyelid margins

Question 8

limbus

Answer 8

junction of the cornea and sclera

Question 9

palpebral conjunctiva

Answer 9

blood vessels will move when pushed

conj on the eyelid

Question 10

bulbar conjunctiva

Answer 10

blood vessels will move when pushed

conj on the eyeball

Question 11

fornix of the eyelids

Answer 11

the recess where the conjunctiva is reflected from the eyelid onto the sclera

Question 12

eyelid margin

Answer 12

rest against the globe

contain eyelashes, the pores of the meibomian glands, mucocutaneous junction and puncta

Question 13

meibomian gland openings of the eyelids

Answer 13

posterior to the eyelashes

anterior to the mucocutaneous junction

Question 14

meibomian glands

Answer 14

can be seen when the lids are everted
appear as yellowish ridges
secretes the lipid layer

Question 15

punctum

Answer 15

1 in tear drainage

medial openings leading into the lacrimal drainage system
superior and inferior
Lie on the lacrimal papilla
surrounded by a dense ring of CT and elastic fibers to keep it open
drains tears from the lake by capillary action
punctum leads to canaliculus to common canaliculus to lacrimal sac to nasolacrimal duct to inferior meatus

Question 16

canaliculus

Answer 16

#2 in tear drainage
have horizontal (2 mm) and vertical (8 mm) portions
the two portions unite to form common canaliculus

Question 17

common canaliculus

Answer 17

#3 in tear drainage
the angle at which the common canaliculus enters the lacrimal sac produces a physiological valve to prevent tear and debris reflus

Question 18

lacrimal sac

Answer 18

4 in tear drainage

Question 19

nasolacrimal duct

Answer 19

5 in tear drainage

Question 20

inferior meatus

Answer 20

Last in tear drainage

Question 21

palpebral part of orbicularis oculi

Answer 21

Used to help gently close the eyelids

helps hold the eyelid margins to the eyeball

Question 22

muscle of Riolan

Answer 22

part of the palpebral part of orbicularis oculi that helps hold the lid margins to the eyeball, to allow the puncta to drain tears from the lacrimal lake

Question 23

Tarsal plates

Answer 23

house the meibomian glands

Question 24

Glands of Zeiss

Answer 24

???????

Question 25

Glands of Krause

Answer 25

secretes the aqueous layer

Question 26

Glands of Wolfring

Answer 26

secretes the aqueous layer

Question 27

Glands of Moll

Answer 27

???????

Question 28

Lacrimal gland and its duct

Answer 28

located in the lacrimal fossa
secretes the watery portion of the tears
superior temporal

Question 29

goblet cells

Answer 29

secrete the mucus component of the tear film

Question 30

levator palpebrae superioris

Answer 30

elevates the eyelid.

insertion of its aponeurosis into the skin causes the superior palpebral sulcus

Question 31

Muller’s muscle

Answer 31

helps to widen the palpebral fissure by about 1-2 mm

Question 32

orbital septum

Answer 32

????

Question 33

fossa for the lacrimal sac

Answer 33

bony structure

holds the lacrimal sac

Question 34

nasolacrimal canal

Answer 34

bony structure holding the nasolacrimal duct

Question 35

opening into nasolacrimal canal

Answer 35

in the floor of the maxilla

Question 36

Jones Test

Answer 36

Fluoroscene is put in the eyes

if the patient can see the dye when blowing their nose it is a positive jones result

Question 37

Controls on a slit lamp

Answer 37

Magnification knob
oculars
two wheels (one controls colors and one controls beam height)
horizontal beam width control
lock down screw
joystick
illumincation rheostat
on/off switch