National Certification Organization
for Opticians
The National Contact Lens Examiners (NCLE) ABO
American Board of Opticianry
CLRE Contact Lens Registry Examination
Examination
180 minutes
Instructions:
1. Read each question carefully.
2. Answer all questions.
3. Use the provided answer sheet to mark your responses.
4. Ensure all answers are final before submitting the exam.
5. Please answer each question below and click Submit when you have completed
the Exam.
6. This test has a time limit, The test will save and submit automatically when the
time expires
7. This is Exam which will assess your knowledge on the course Learning
Resources.
Good Luck!
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NCLE National Contact Lens Examiners Review Exam
Questions and Answers | 100% Pass Guaranteed |
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2025- 2026
The National Contact Lens Examiners NCLE
ABO American Board of Opticianry
CLRE Contact Lens Registry Examination
Read All Instructions Carefully and Answer All the
Questions Correctly Good Luck: -
1. The following is an example of what type of astigmatism?
K's 44.00@.50@90
Rx -3.00 -2.50 x 180
A. Lenticular Astigmatism
B. Against the Rule Astigmatism
C. Irregular Astigmatism
D. Oblique Astigmatism - =Answer>> A. Lenticular
Astigmatism
2. If a soft contact lens decenters laterally, exposing a portion of
the patient's limbus, what change in parameter would improve
this situation?
A. Decreasing lens diameter
B. Increase lens diameter
C. Flatten base curve
D. Steepen base curve - =Answer>> B. Increase lens
diameter
3. Which of the following is preservative found in soft contact lens
solutions:
A. Chlorbutanol
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B. Polyquad
C. Chloride
D. Alcohol - =Answer>> B. Polyquad
4. If the diagnostic rigid gas permeable lens placed on the eye
results in minimal movement, which of the following will
increase the movement on the lens ordered for the patients?
A. Increasing optic zone diameter
B. Increasing sagittal depth
C. Decrease overall lens diameter
D. Increasing overall diameter - =Answer>> C. Decrease
overall lens diameter
5. The preservative in contact lens solutions:
A. Must demonstrate efficacy in killing bacterial, viral and
fungal microorganisms
B. Is usually a mercury compound such as thimerosal
C. Must kill all mircoorganisms on a contact lens in a 4 hour
soak period
D. Is formulated to keep microorganism from multiplying in a
bottle of contact lens solution after it has been opened -
=Answer>> D. Is formulated to keep microorganisms
from multiplying in a bottle of contact lens solutions after it
has been opened
6. If a soft contact lens becomes adherent to the cornea, the
patient should:
A. Irrigate with warm water until the lens becomes loose.
B. Pinch the lens off of the eye by placing the thumb on the
cornea to break the suctions.
C. Use a DMV suction cup to remove the lens.
D. Irrigate the eye with saline or rewetting drops until the lens
begins to move freely again. - =Answer>> D. Irrigate the
eye with saline or rewetting drops until the lens begins to
move freely again.
7. During the diagnostic evaluation of the following patient you
observe that the lens rotates 10 degrees to the right, Which of
the following lens parameters would you order for the patient?
Patient's refraction -2.50-1.00 x 170
8. Diagnostic lens 8.7 -2.50-1.00 x 170
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A. -2.50-1.00x160
B. -2.50-1.00x170
C. -2.50-1.00X180
D. -2.50-1.00x010 - =Answer>> A. -2.50-1.00x160
9. Which of the following materials would least likely require a
weekly enzymatic cleaner?
A. Polymethylmethacrylate
B. Hydrophilic
C. Silicone
D. Hydroxethyl - =Answer>> A. Polymethylmethacrylate
10. What is the term for the condition in which there is loss of
vision without any apparent disease to the eye?
A. Amblyopia
B. Aniridia
C. Astigmatism
D. Aphakia - =Answer>> A. Amblyopia
11. Which term refers to a sensitivity to light?
A. Prebyopia
B. Photophobia
C. Pannus
D. Ptosis - =Answer>> B. Photophobia
12. Which type of slit lamp illumination is used for observing
tear break up time?
A. Retro
B. Diffuse
C. Specular
D. Sclerotic - =Answer>> B. Diffuse
13. Thermal disinfection of soft lenses:
A. Extend the life of the contacts since it kills microorganisms
better than chemicals.
B. Can be done by boiling the lens case in a pot of water for
one hour if thermal disinfection is not available.
C. Is effective against acanthamoeba cysts and trophozoites.
D. Does not require prior cleaning with a surfactant since it
kills microorganisms efficiently. - =Answer>> C. Is
effective against acanthamoeba cysts and trophozoites.
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