Exam 1 Remington Episclera and Sclera, Tenon's Capsule, Bulbar, and Limbus Flashcards Preview

Anatomy and Biochemisty > Exam 1 Remington Episclera and Sclera, Tenon's Capsule, Bulbar, and Limbus > Flashcards

Flashcards in Exam 1 Remington Episclera and Sclera, Tenon's Capsule, Bulbar, and Limbus Deck (29):
1

Where is the location of the sclera?

Posterior 5/6 of globe

2

What is the cellular composition of the sclera?

Dense irregular CT, avascular

3

The sclera is continuous with what?

Corneal stroma

4

What is the difference between the sclera and the corneal stroma?

Sclera has fewer GAG, less regular pattern of fibers

5

What does a white sclera mean?

In health

6

What does a blue sclera mean?

Thin or transparent

7

What does a yellow sclera mean?

With fat deposits or liver dysfunction

8

What is the anterior scleral foramina?

Cornea

9

What is the posterior scleral foramina?

Optic nerve, lamina cribrosa

10

What is the lamina cribrosa?

Meshwork of scleral fibers

11

What are the anterior apertures of the sclera?

Near the limbus, anterior ciliary arteries

12

What are the middle apertures of the sclera?

Near the equator, vortex veins

13

What are the posterior apertures of the sclera?

Around the optic nerve, long and short posterior ciliary arteries and nerves

14

Where is the location of the episclera?

Outer to the sclera

15

What is the composition of the episclera?

Loose vascular CT

16

What is Tenon's capsule?

Dense CT capsule, outer to episcleral

17

Where is the location of the bulbar conjunctiva?

Outer to Tenon's capsule, continuous with palpebral conj at fornices

18

What is the cellular composition of the bulbar conjunctia?

Stratified non-keratinizaed columnar epithelium, contains goblet cells

19

What is the composition of the bulbar conjunctiva stroma?

The stroma is called the submucosa. It is immunologically active and contains blood vessels and lymphatics

20

Ciliary injection

Involves deeper ciliary vasculature and is somewhat purple in color

21

Conjunctival injection

Involves more superficial vessels

22

What is the location of the limbus?

Annular region surrounding corneal periphery

23

What is the width of the limbus?

1.5-2 mm in width

24

What is the anterior border of the limbus?

Line drawn from termination of Bowman's to termination of Descemet's

25

What is the posterior border of the limbus?

Line from the posterior scleral spur to conj surface and perpendicular to it

26

What are the 3 landmarks of the limbus?

External scleral sulcus, internal scleral sulcus, and Palisades of Vogt

27

Where is the location of the trabecular meshwork and Schlemm's canal?

Internal scleral sulcus

28

What are the Palisades of Vogt?

Grey "pegs", regions of thickened epithelium considered "niche" for corneal and conjunctival stem cells, contain BVs and melanocytes

29

What is the histology of the limbus?

Corneal epithelium transitions into conjunctial epithelium, corneal stroma transitions into sclera, Bowman's and Descemet's end, conjunctival stroma begins, episclera begins, Tenon's begins, and corneal endothelium continues as endothelium of trabecular meshwork