Practice Test GeeksNOCE - National Opticianry Competency Examination Practice Test
← All NOCE Flashcard Decks

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 type of anti-reflective (AR) coating layer is responsible for repelling water, oils, and smudges?

    Answer: The hydrophobic top coat

    The hydrophobic top coat, also called an oleophobic layer, forms the outermost surface and repels water and oils to make lenses easier to clean.

  2. A patient reports that their acetate frame has become too tight after adjustment. What is the safest method to re-soften and reshape the frame front?

    Answer: Use a frame warmer or salt pan at 140-160°F (60-71°C)

    A frame warmer or salt pan at 140–160°F is the controlled, safe method to soften acetate for adjustment without scorching or warping.

  3. What does the term 'zygomatic arch adjustment' refer to in frame fitting?

    Answer: Adjusting pantoscopic tilt to accommodate high cheekbones

    A zygomatic (cheekbone) adjustment involves modifying the pantoscopic tilt or frame fit to account for a patient's prominent cheekbones that affect how the frame sits.

  4. Which lens material is MOST impact-resistant and is required by ANSI Z87.1 for occupational safety eyewear?

    Answer: Polycarbonate

    Polycarbonate is the most impact-resistant common ophthalmic material and meets ANSI Z87.1 requirements for occupational safety eyewear.

  5. A frame's eye size is 54, DBL is 16, and the patient's PD is 64 mm. What is the decentration per lens needed for proper optical alignment?

    Answer: 3 mm temporal decentration per lens

    Frame PD = (54/2) + 16 + (54/2) = 70 mm; patient PD = 64 mm; difference = 6 mm total, so 3 mm temporal decentration per lens is required.

  6. What type of lens treatment selectively absorbs specific wavelengths of blue-violet light while allowing beneficial blue-turquoise light to pass?

    Answer: Selective blue light filtering (blue-light blocking) coating

    Selective blue light filtering coatings are designed to block harmful blue-violet light (around 415–455 nm) while allowing beneficial blue-turquoise light (~480 nm) to pass.

  7. A patient's titanium frame temple has snapped at the hinge. What property of titanium makes soldering this repair particularly challenging?

    Answer: Titanium requires an inert gas atmosphere during welding to prevent oxidation

    Titanium reacts with oxygen and nitrogen at high temperatures, requiring an inert gas (argon) atmosphere or laser welding to make a clean, strong repair.