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Spectacle Dispensing Procedures 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 Spectacle Dispensing Procedures flashcards as text

  1. A hyperopic patient requires +4.00 lenses. To minimize lens thickness, the dispenser should recommend:

    Answer: A frame with a small eye size and a high-index lens material

    Small eye sizes reduce center thickness in plus lenses, and high-index materials reduce thickness further by requiring less curvature for the same power.

  2. Which adjustment corrects a frame that causes the lenses to appear tilted nasally downward on the patient's face?

    Answer: Spread the left nose pad and close the right nose pad

    Unequal nose pad adjustment (spreading one side, closing the other) levels and rotates the frame front to correct a nasal tilt.

  3. When measuring monocular PDs for progressive lens fitting, the measurement is taken from the center of which anatomical structure?

    Answer: The nasal bridge midline to each pupil center

    Monocular PD is measured from the bridge midline (root of the nose) to the center of each pupil independently.

  4. A patient presents with a prescription of OD +2.00 –1.50 × 90 and OS +1.75 –1.25 × 85. When verifying on the lensometer, the optician should verify the cylinder axis is within what ANSI Z80.1 tolerance for this power?

    Answer: ±3°

    ANSI Z80.1 allows ±3° axis tolerance for cylinder powers between 0.25 D and 0.50 D (up to 1.50 D cyl), and tighter for higher cylinders.

  5. A patient fitted with a new single vision Rx reports blurry vision in primary gaze but clear vision when they tilt their head. This most likely indicates:

    Answer: Optical centers placed too high or too low relative to the pupils

    When OCs are vertically misplaced, the patient involuntarily tilts their head to bring the pupil into alignment with the OC.

  6. What is the purpose of the 'fitting cross' marked on a progressive lens before edging?

    Answer: Marks the pupil alignment point used to set fitting height

    The fitting cross is placed at the patient's pupil level to set the lens' intermediate corridor in the correct vertical position.

  7. Which of the following frame materials has the lowest density (lightest weight per unit volume)?

    Answer: TR-90 nylon

    TR-90 is an ultra-lightweight thermoplastic nylon with one of the lowest densities of all spectacle frame materials.