Practice Test Geeks(CPOA) Certified Paraoptometric Assistant Practice Test
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Spectacle Dispensing Flashcards

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

Read the first 7 Spectacle Dispensing flashcards as text

  1. Prentice's Rule states that prismatic effect (prism diopters) equals:

    Answer: Lens power multiplied by decentration in cm

    Prentice's Rule: Δ = F × c, where F is lens power in diopters and c is decentration in centimeters.

  2. A patient picking up new glasses complains the left lens looks darker than the right. Which is the most likely explanation for plastic frames?

    Answer: The tinting process was uneven or the lenses were different materials

    Uneven tint absorption typically results from inconsistent immersion time, temperature, or different lens materials that take dye differently.

  3. Which temple style wraps completely around the ear and is commonly used in children's or safety frames?

    Answer: Riding bow (cable) temple

    Riding bow (cable) temples curl completely around the ear, providing extra retention used in active-wear, safety, and pediatric frames.

  4. The minimum recommended lens size for a given prescription is determined primarily by:

    Answer: The patient's pupillary distance and frame PD

    The minimum blank size must accommodate the optical center placement relative to the patient's PD and the frame's geometric center PD.

  5. Which coating is applied to a lens to reduce the build-up of static charge and repel dust particles?

    Answer: Anti-static coating

    Anti-static coatings neutralize electrostatic charges on the lens surface, helping prevent dust and lint attraction.

  6. When verifying a finished lens with a lensometer, the target (mires) should be focused at what position for reading the sphere power?

    Answer: The single dot or cross target at center

    The sphere power is read when the central dot or cross of the lensometer target is in sharp focus, before rotating the cylinder axis.

  7. A frame is described as having 'spring hinges.' What is the primary benefit of this feature?

    Answer: The temples flex outward and spring back, improving retention and durability

    Spring hinges contain a tensioned mechanism that allows temples to flex beyond 90° and return to position, reducing frame stress and improving fit.