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Ophthalmic Products and Frames Flashcards

7 cards from real NOCE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Ophthalmic Products and Frames flashcards as text

  1. Which frame material is most resistant to chemical solvents and is often recommended for patients who work in laboratory environments?

    Answer: Nylon (polyamide)

    Nylon (polyamide) frames are highly resistant to chemical solvents and heat, making them suitable for laboratory or industrial environments.

  2. A patient's frame has a bridge size of 18 and an eye size of 52. Using the boxing system, what is the distance between lenses (DBL)?

    Answer: 18 mm

    In the boxing system, the bridge size (DBL) is the measurement between the two lenses, which in this case is 18 mm.

  3. What is the primary advantage of a frame with a comfort cable temple compared to a standard skull temple?

    Answer: Greater retention behind the ear for active patients

    Comfort cable temples wrap around the ear, providing greater retention, which is ideal for children and physically active patients.

  4. Which of the following lens materials has the highest Abbe value, indicating the least chromatic aberration?

    Answer: CR-39 (Abbe ~58)

    CR-39 has an Abbe value of approximately 58, the highest among common ophthalmic plastics, meaning it produces the least chromatic aberration.

  5. A patient wants photochromic lenses but spends most of their time driving. What should you advise?

    Answer: Photochromics may not darken adequately inside a car because most windshields block UV

    Most car windshields are UV-laminated and block the UV light needed to activate standard photochromic lenses, limiting their darkening inside vehicles.

  6. What does the term 'base curve' refer to on an ophthalmic frame?

    Answer: The curvature of the front frame along the horizontal plane

    Base curve on a frame refers to the curvature of the front eyewire, measured in diopters, which determines how wrap-around the frame appears.

  7. Which coating is applied to lenses FIRST during the manufacturing process to serve as a foundation for other coatings?

    Answer: Hard coat (scratch-resistant coat)

    Hard coat (scratch-resistant coating) is typically applied first to provide a smooth, durable substrate for subsequent coatings such as anti-reflective layers.