NCLE Advanced Certification Exam
Questions and Correct Answers
Question 1
Which of the following medications may affect successful contact lens wear?
A. Antacids
B. Antihistamines
C. Aspirin
D. Laxatives
Correct Answer
B. Antihistimines
Question 2
Which term refers to a sensitivity to light?
A. Prebyopia
B. Photophobia
C. Pannus
D. Ptosis
Correct Answer
B. Photophobia
Question 3
The following is an example of what type of astigmatism?
K's 42.50 @ .50 @ 90
A. With the Rule Astigmatism
B. Lenticular Astigmatism
C. Against the Rule Astigmatism
D. Irregular Astigmatism
Correct Answer
C. Against the Rule Astigmatism
This is present when the K readings are steeper i the horizontal meridian than the
vertical meridian
Page 1 of 22
,Question 4
The cornea receives nutrients from:
1) Aqueous Humor 2) Tears
3) Limbal Blood Vessels 4) Orbicularis Occuli
A. 1, 3 & 4
B. 2 &3
C. 1, 2 & 3
D. 3 & 4
Correct Answer
C. 1, 2 & 3
The normal cornea is devoid of blood vessels. To provide metabolites, the cornea is
nourished by diffusion of nutrients and oxygen by the aqueous humor, tears, and
vascular blood vessels in the limbus.
(The orbicularis occuli is a muscle in the eyelid whose primary function is lid closure)
Question 5
The increased loss of ability of the crystalline lens to accommodate is called:
A. Presbyopia
B. Myopia
C. Hyperopia
D. Aphakia
Correct Answer
A. Presbyopia
Question 6
Which instrument can provide simultaneous information about the cornea, lids,
conjunctiva, lashes, contact lens surface and fit?
A. Radiuscope
B. Corneoscope
C. Slit Lamp
D. Keratometer
Correct Answer
C. Slit Lamp
The slit lamp (or biomicroscope) can provide simultaneous information about the
cornea, lids, conjunctiva, lashes, contact lens surface and fit.
Page 2 of 22
, Question 7
The pre-corneal tear film is composed of three layers which are:
A. Lysozyme, oil, lacrimal
B. Sebaceous, mucoid, BAK
C. Lipid, aqueous, mucin
D. Water, mucoid, lysozyme
Correct Answer
C. Lipid, aqueous, mucin
The pre-corneal tear film is composed of lipid, aqueous, and mucin layers. The lipid
layer is traditionally thought of as most anterior (front) while the mucin layer is most
posterior (back)
Question 8
Transpose the following Rx into minus cylinder form:
Rx -4.50 +1.25 x 94
A. -3.25 -1.25 x 4
B. -3.25 -1.25 x 94
C. -4.50 -1.25 x 4
D. -5.75 - 1.25 x 4
Correct Answer
A. -3.25 -1.25 x 4
Question 9
The average pH value of the human tear is:
A. 6.6
B. 7.4
C. 7.8
D. 10.0
Correct Answer
B. 7.4
Values higher than 7.4 are considered relatively alkaline, whereas values lower than
7.4 are considered relatively acidic
Page 3 of 22
Questions and Correct Answers
Question 1
Which of the following medications may affect successful contact lens wear?
A. Antacids
B. Antihistamines
C. Aspirin
D. Laxatives
Correct Answer
B. Antihistimines
Question 2
Which term refers to a sensitivity to light?
A. Prebyopia
B. Photophobia
C. Pannus
D. Ptosis
Correct Answer
B. Photophobia
Question 3
The following is an example of what type of astigmatism?
K's 42.50 @ .50 @ 90
A. With the Rule Astigmatism
B. Lenticular Astigmatism
C. Against the Rule Astigmatism
D. Irregular Astigmatism
Correct Answer
C. Against the Rule Astigmatism
This is present when the K readings are steeper i the horizontal meridian than the
vertical meridian
Page 1 of 22
,Question 4
The cornea receives nutrients from:
1) Aqueous Humor 2) Tears
3) Limbal Blood Vessels 4) Orbicularis Occuli
A. 1, 3 & 4
B. 2 &3
C. 1, 2 & 3
D. 3 & 4
Correct Answer
C. 1, 2 & 3
The normal cornea is devoid of blood vessels. To provide metabolites, the cornea is
nourished by diffusion of nutrients and oxygen by the aqueous humor, tears, and
vascular blood vessels in the limbus.
(The orbicularis occuli is a muscle in the eyelid whose primary function is lid closure)
Question 5
The increased loss of ability of the crystalline lens to accommodate is called:
A. Presbyopia
B. Myopia
C. Hyperopia
D. Aphakia
Correct Answer
A. Presbyopia
Question 6
Which instrument can provide simultaneous information about the cornea, lids,
conjunctiva, lashes, contact lens surface and fit?
A. Radiuscope
B. Corneoscope
C. Slit Lamp
D. Keratometer
Correct Answer
C. Slit Lamp
The slit lamp (or biomicroscope) can provide simultaneous information about the
cornea, lids, conjunctiva, lashes, contact lens surface and fit.
Page 2 of 22
, Question 7
The pre-corneal tear film is composed of three layers which are:
A. Lysozyme, oil, lacrimal
B. Sebaceous, mucoid, BAK
C. Lipid, aqueous, mucin
D. Water, mucoid, lysozyme
Correct Answer
C. Lipid, aqueous, mucin
The pre-corneal tear film is composed of lipid, aqueous, and mucin layers. The lipid
layer is traditionally thought of as most anterior (front) while the mucin layer is most
posterior (back)
Question 8
Transpose the following Rx into minus cylinder form:
Rx -4.50 +1.25 x 94
A. -3.25 -1.25 x 4
B. -3.25 -1.25 x 94
C. -4.50 -1.25 x 4
D. -5.75 - 1.25 x 4
Correct Answer
A. -3.25 -1.25 x 4
Question 9
The average pH value of the human tear is:
A. 6.6
B. 7.4
C. 7.8
D. 10.0
Correct Answer
B. 7.4
Values higher than 7.4 are considered relatively alkaline, whereas values lower than
7.4 are considered relatively acidic
Page 3 of 22
