ABO NOCE Basic Opticianry Study Guide 2026
Everything you need to pass the ABO NOCE Basic Opticianry exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 ABO NOCE Basic Opticianry Exam Format at a Glance
📚 ABO NOCE Basic Opticianry Topics to Study (36)
✍️ Sample ABO NOCE Basic Opticianry Questions & Answers
1. For a lens with a sphere power of +8.00 D, what is the ANSI Z80.1 tolerance for power?
For sphere powers greater than +/- 6.50 D, the ANSI Z80.1 tolerance is 2% of the specified power. In this case, the tolerance would be 8.00 * 0.02 = +/- 0.16 D.
2. What sort of lens has a surface that is both convex and concave?
A meniscus lens is characterized by having one convex surface and one concave surface. This design allows for better optical performance, reduced peripheral aberrations, and a thinner, more aesthetically pleasing lens, especially for higher prescriptions. Most modern spectacle lenses are manufactured with a meniscus shape.
3. A pair of industrial safety glasses is marked with "Z87+". What does the "+" signify?
The ANSI Z87.1 standard designates safety eyewear ratings. The base "Z87" marking indicates that the eyewear meets basic impact standards, including the drop ball test. The "Z87+" marking signifies that the eyewear has passed a more rigorous set of high-velocity and high-mass impact tests, offering a higher level of protection.
4. According to the U.S. Food and Drug Administration's regulation for standard dress eyewear (21 CFR 801.410), what are the specifications for the 'drop ball test' used to ensure impact resistance?
The FDA regulation at 21 CFR 801.410 specifies that to test the impact resistance of dress eyewear lenses, a 5/8-inch steel ball (weighing approx. 0.56 ounces) must be dropped from a height of 50 inches onto the lens. The lens must not fracture to pass the test.
5. According to FDA regulations, what is the purpose of the "drop ball test" for spectacle lenses?
The FDA requires that eyeglass and sunglass lenses sold in the U.S. meet a minimum standard for impact resistance to protect the wearer's eyes. The drop ball test, which involves dropping a 5/8-inch steel ball from a height of 50 inches onto the lens, is the standard method to verify this resistance. To pass, the lens must not fracture, chip, or crack.
6. The facial measurement 'DBL' (distance between lenses) refers to:
DBL is the distance between lenses — the clear horizontal gap between the inner (nasal) edges of the two lenses in the frame.