Trivia Flashcards
7 cards from real ABO NOCE Basic Opticianry practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Trivia flashcards as text
Which federal law in the US requires that patients be given a copy of their eyeglass prescription after an eye exam?
Answer: The Eyeglass Rule (FTC)
The FTC's Eyeglass Rule mandates that prescribers give patients a copy of their eyeglass prescription at no charge upon completion of the exam.
What is the term for the horizontal distance between the patient's pupils, used for lens alignment?
Answer: Pupillary distance (PD)
Pupillary distance (PD) is the measurement in millimeters between the centers of the two pupils, used to align lens optical centers.
Which lens treatment is specifically designed to block high-energy visible (HEV) blue light?
Answer: Blue light blocking coating
Blue light blocking coatings are designed to filter or absorb high-energy visible (HEV) blue light, commonly emitted by digital screens.
What does 'transposition' mean in opticianry?
Answer: Rewriting a prescription in a different but equivalent cylinder form
Transposition is the mathematical process of converting a prescription between plus and minus cylinder notation while keeping the optical effect identical.
What is the index of refraction of standard CR-39 plastic lens material?
Answer: 1.50
CR-39 (Columbia Resin #39) has a refractive index of approximately 1.50, making it the standard reference for plastic ophthalmic lenses.
A patient needs reading glasses and asks for the strongest magnification available OTC. What is the maximum power typically found in OTC readers?
Answer: +3.00 D
OTC reading glasses are typically available up to +3.00 D; powers above this generally require a custom prescription.
What is the primary purpose of frame adjustments at the pantoscopic tilt?
Answer: To align the optical axis of the lens with the patient's visual axis
Pantoscopic tilt angles the bottom of the frame forward to align the lens optical axis with the patient's line of sight during normal reading posture.