The anterior segment (front of eye) Flashcards Preview

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Flashcards in The anterior segment (front of eye) Deck (26)
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1

The clear membrane at the front of the globe that begins the process of focusing light that the eye receives is called

The Cornea

2

What are the 5 layers of the cornea?

Listed from the outside surface in:
1. Corneal epithelium
2. Bowman's membrane
3. Corneal stroma
4. Descemet's membrane
5. Corneal endothelium

3

The outermost corneal layer, providing defense against injury and infection is

Corneal epithelium

4

The _______ acts as an anchor for the epithelial layer

Bowman's membrane

5

The main body of the cornea, contributing to the cornea's rigidity is the

Corneal Stroma

6

The fourth layer of the cornea contributing to its rigidity is the

Descemet's membrane

7

The cells of the ______ act as pumps to maintain a proper fluid balance within the cornea

Corneal endothelium

8

The white tissue surrounding the cornea is a continuation of the fibrous outer layer that forms the main structural component of the globe, protecting the intraocular contents. This tissue is called

The Sclera

9

The junction between the sclera and the cornea is the

Limbus

10

The small compartment between the cornea and the iris that is filled with aqueous humor

Anterior Chamber

11

The junction of the cornea and the iris, from which aqueous humor leaves the eye is

Anterior Chamber Angle
aka Filtration angle

12

A structure that drains the aqueous humor from the anterior chamber after it has flowed through the trabecular meshwork is

Canal of Schlemm

13

The sponge-like structure that filters the aqueous humor from the anterior chamber and controls its rate of flow out of the eye is the

Trabecular Meshwork

14

What is the main vascular compartment of the eye?

The Uvea/Uveal Tract

15

What are the three parts of the uveal tract?

1. Iris
2. ciliary body
3. Choroid

16

A colored diaphragm of tissue that is stretched across the rear of the anterior chamber behind the cornea is

the Iris

17

What is the iris muscle that dilates the pupil in reduced light conditions? Fibers from this muscle stretch from the pupil to the outer boundaries of the iris

Dilator Muscle

18

What is the name of the muscle that encircles the pupil and makes the pupil smaller in response to bright light?

Sphincter Muscle

19

The space between the back of the iris and the front of the vitreous where the crystalline lens is suspended is?

The Posterior Chamber

20

A band-like structure of muscle and secretory tissue that extends from the edge of the iris and encircles the inside of the sclera is

The ciliary body

21

The inner surface of the ciliary body is arranged in folds, rows, or ridges called

Ciliary processes

22

The muscle fibers in the ciliary body form the

Ciliary muscle

23

The 3rd part of the uveal tract, the ______, is a continuation of the ciliary body in the form of a layer of tissue that lies between the sclera and the retina

Choroid

24

The transparent structure located immediately behind the iris, suspended in the posterior chamber, is the

Crystalline lens

25

The lens is suspended by transparent fibers called

Zonules

26

The lens itself consists of an outer clear, elastic capsule filled with a clear inner core called the nucleus that is surrounded by _______ (a clear, paste-like protein)

Cortex