NCLE Prep Exam Part 1 of 4 Questions and Answers
The slit lamp (or biomicroscope) can provide simultaneous information about the cornea, lids,
conjunctiva, lashes, contact lens surface and fit.
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 -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)
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 -Answer A. -3.25 -1.25 x 4
The average pH value of the human tear is:
,A. 6.6
B. 7.4
C. 7.8
D. 10.0 -Answer B. 7.4
Values higher than 7.4 are considered relatively alkaline, whereas values lower than 7.4 are
considered relatively acidic
If the manufacturer's guidelines suggest a minimum of 4 hours for disinfection, what would
you
suggest to the patient?
A. Never leave lenses in disinfectant overnight
B. 2 to 3 hours is probably enough
C. Use surfactant cleaner and preserved saline
D. A minimum of 4 hours is required -Answer D. Minimum of 4 hours required
Patients should always be directed to follow the manufacturer's guidelines and not try to cut
corners by leaving lenses in any solution for less than the recommended time.
The main supply of oxygen to the corneal epithelium is derived from the:
A. Stroma
B. Collagen Fibrils
, C. Basal
D. Tear Film -Answer D. Tear Film
100% Solved
Which of the following medications may affect successful contact lens wear?
A. Antacids
B. Antihistamines
C. Aspirin
D. Laxatives -Answer B. Antihistimines
Which term refers to a sensitivity to light?
A. Prebyopia
B. Photophobia
C. Pannus
D. Ptosis -Answer B. Photophobia
The following is an example of what type of astigmatism?
K's 42.50 @ .50 @ 90
A. With the Rule Astigmatism
B. Lenticular Astigmatism
The slit lamp (or biomicroscope) can provide simultaneous information about the cornea, lids,
conjunctiva, lashes, contact lens surface and fit.
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 -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)
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 -Answer A. -3.25 -1.25 x 4
The average pH value of the human tear is:
,A. 6.6
B. 7.4
C. 7.8
D. 10.0 -Answer B. 7.4
Values higher than 7.4 are considered relatively alkaline, whereas values lower than 7.4 are
considered relatively acidic
If the manufacturer's guidelines suggest a minimum of 4 hours for disinfection, what would
you
suggest to the patient?
A. Never leave lenses in disinfectant overnight
B. 2 to 3 hours is probably enough
C. Use surfactant cleaner and preserved saline
D. A minimum of 4 hours is required -Answer D. Minimum of 4 hours required
Patients should always be directed to follow the manufacturer's guidelines and not try to cut
corners by leaving lenses in any solution for less than the recommended time.
The main supply of oxygen to the corneal epithelium is derived from the:
A. Stroma
B. Collagen Fibrils
, C. Basal
D. Tear Film -Answer D. Tear Film
100% Solved
Which of the following medications may affect successful contact lens wear?
A. Antacids
B. Antihistamines
C. Aspirin
D. Laxatives -Answer B. Antihistimines
Which term refers to a sensitivity to light?
A. Prebyopia
B. Photophobia
C. Pannus
D. Ptosis -Answer B. Photophobia
The following is an example of what type of astigmatism?
K's 42.50 @ .50 @ 90
A. With the Rule Astigmatism
B. Lenticular Astigmatism
