Quiz 1

Question 1

The normal cornea is in a state of :

A) Deturgesence
B) Turgesence
C) Hypoxia
D) Hypermia

Answer 1

A) Deturgesence

Definition:
State of relative dehydration necessary to maintain the transparency of the cornea of the eye.

Question 2

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

A) Fenestration
B) Palpebral Fissure
C) Lid Clearance
4) Blepharospasm

Answer 2

B) Palpebral Fissure

Definition:

The elliptic space between the medial and lateral canthi of the two open eyelids.

Question 3

The junction of the cornea and the sclera is the:

A) Limbus
B) Optical Zone
C) Pupil
D) Positive Zone

Answer 3

A) Limbus

Definition:

The border or margin of a structure, especially the junction of the cornea and sclera in the eye.

Question 4

The layer directly beneath the epithelium of the cornea is:

A) Bowman’s membrane
B) The endothelium
C) Descemet’s membrane
D) The Substantia Propria

Answer 4

A) Bowman’s Membrane

Definition:

The layer just underneath the epithelium, which is outermost portion of the cornea.

Question 5

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

A) Supplying nutrition to the cornea
B) Providing Carbon Dioxide
C) Furnishing a smooth optical surface for the cornea.
D) acting as a lubricant to the cornea

Answer 5

B) Providing Carbon Dioxide

Question 6

A normal Tear break up time is:

A) 6-7 seconds
B) less than 5 seconds
C) 12-15 seconds
D) 1-2 minutes

Answer 6

C) 12-15 seconds

Question 7

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

A) tears
B) collagen fibers
C) endothelium
D) basal membrane

Answer 7

A) Tears

Question 8

The outer layer of the cornea is the:

A) endothelium
B) bowman’s membrane
C) epithelium
D) stroma

Answer 8

C) Epithelium

Question 9

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

A) descemets membrane
B) epithelium
C) endothelium
D) bowman’s membrane

Answer 9

C) Endothelium

Question 10

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

A) Sebacious, mucoid, bak
B) water, mucoid, lysozyme
C) lipid, lacrimal, mucin
D) lysozyme, oil, lacrimal

Answer 10

C) lipid, lacrimal, mucin