Quiz 1

Question 1

The layer directly beneath the epithelium of the cornea is

a. Enthothelium
b. Bowman’s Membrane
c. The Substantia Propria
d. Descemet’s Membrane

Answer 1

b. Bowman’s Membrane

Question 2

The junction of the cornea and the sclera is the

a. Positive zone
b. Pupil
c. Limbus
d. Optical zone

Answer 2

c. Limbus

Question 3

The distance between the upper and lower eyelid margins is called the

a. Palpebral Fissure
b. Fenestration
c. Blepharospasm
d. Lid Clearance

Answer 3

a. Palpebral Fissure

Question 4

The main supply of oxygen to the cornea is derived from the

a. Endothelium
b. Tears
c. Collagen Fibers
d. Basal Membrane

Answer 4

b. Tears

Question 5

All of the following are functions of the pre corneal film except

a. Furnishing a smooth optical surface for the cornea
b. Supplying nutrition to the cornea
c. Acting as a lubricant to the cornea
d. Providing carbon dioxide

Answer 5

d. Providing carbon dioxide

Question 6

The normal cornea is transparent due to a pumpong action which creates a proper fluid balance. Which later of the cornea is responsible for maintaining this function?

a. Bowman’s Membrane
b. Descemet’s Membrane
c. Epithelium
d. Endothelium

Answer 6

d. Endothelium

Question 7

The outer layer of the cornea is the

a. Epithelium
b. Endothelium
c. Bowman’s Membrane
d. Stroma

Answer 7

a. Epithelium

Question 8

The pre-corneal tear film is composed of three distinct layers. They are:

a. Lysozyme, Oil, Lacrimal
b. Lipid, Lacrimal, Mucin
c. Sebacious, Mucoid, Bak
d. Water, Mucoid, Lysozyme

Answer 8

b. Lipid, Lacrimal, Mucin

Question 9

The normal cornea is in a state of

a. Deturgesence
b. Turgesence
c. Hypermia
d. Hypoxia

Answer 9

a. Deturgesence

Question 10

A normal tear break up time is:

a. 6-7 seconds
b. Less than 5 seconds
c. 1-2 minutes
d. 12-15 seconds

Answer 10

d. 12-15 seconds