ABO NOCE Basic Opticianry Trivia 2 — Questions and Answers
Question 1: Which organization administers the ABO (American Board of Opticianry) certification exam?
- National Contact Lens Examiners
- American Board of Opticianry (Correct answer)
- American Optometric Association
- Optical Laboratories Association
Correct answer: American Board of Opticianry
The American Board of Opticianry administers the ABO certification for opticianry competency in the United States.
Question 2: What does the abbreviation 'NOCE' stand for in the ABO-NOCE exam?
- National Optician Competency Examination
- National Opticianry Competency Examination (Correct answer)
- National Ocular Contact Examination
- National Optical Credentialing Exam
Correct answer: National Opticianry Competency Examination
NOCE stands for National Opticianry Competency Examination, the contact lens portion of the combined ABO-NOCE credential.
Question 3: A patient's prescription reads +2.00 -1.50 x 090. What type of refractive error does this represent?
- Myopia with against-the-rule astigmatism
- Hyperopia with with-the-rule astigmatism
- Myopia with with-the-rule astigmatism
- Hyperopia with against-the-rule astigmatism (Correct answer)
Correct answer: Hyperopia with against-the-rule astigmatism
A positive sphere indicates hyperopia, and cylinder axis at 090 indicates against-the-rule astigmatism.
Question 4: What is the standard vertex distance assumed when converting high-power prescriptions?
- 10 mm
- 12 mm (Correct answer)
- 14 mm
- 16 mm
Correct answer: 12 mm
The standard assumed vertex distance for ophthalmic prescriptions is 12 mm from the back surface of the lens to the cornea.
Question 5: Which lens material has the highest Abbe value among common ophthalmic materials?
- Polycarbonate
- Trivex
- CR-39 (Correct answer)
- High-index 1.74
Correct answer: CR-39
CR-39 plastic has an Abbe value of approximately 58, the highest among common ophthalmic lens materials, meaning it produces the least chromatic aberration.
Question 6: What does a base curve of '8.6' refer to on a contact lens specification?
- The diameter of the lens in mm
- The radius of curvature of the back surface in mm (Correct answer)
- The power of the lens in diopters
- The oxygen transmissibility rating
Correct answer: The radius of curvature of the back surface in mm
The base curve on a contact lens refers to the radius of curvature (in mm) of the posterior (back) surface of the lens.
Question 7: In opticianry, what is the purpose of a lensometer (focimeter)?
- To measure the curvature of the cornea
- To verify the power and axis of an ophthalmic lens (Correct answer)
- To measure the pupillary distance of a patient
- To assess the fit of a contact lens on the eye
Correct answer: To verify the power and axis of an ophthalmic lens
A lensometer (focimeter) is used to measure and verify the optical power, cylinder axis, and prism of ophthalmic lenses.
ABO NOCE Basic Opticianry Trivia 2
Which organization administers the ABO (American Board of Opticianry) certification exam?