Practice Test Geeks(CPOA) Certified Paraoptometric Assistant Practice Test
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Diagnostic Testing 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 Diagnostic Testing flashcards as text

  1. Which test specifically evaluates a patient's sensitivity to contrast rather than high-contrast letter acuity?

    Answer: Contrast sensitivity testing (e.g., Pelli-Robson chart)

    Contrast sensitivity testing, such as with the Pelli-Robson chart, evaluates how well patients detect differences in luminance, which can reveal visual deficits not shown on Snellen testing.

  2. The Amsler grid is used primarily to detect abnormalities in which area of the visual field?

    Answer: Central 20 degrees (macular area)

    The Amsler grid tests the central 20 degrees of vision and is commonly used to detect metamorphopsia or scotomas from macular disease.

  3. During a slit lamp examination, the technique used to view the anterior chamber angle structures is called:

    Answer: Gonioscopy

    Gonioscopy uses a special contact lens to redirect light and allow direct visualization of the trabecular meshwork and anterior chamber angle.

  4. A patient has a B-scan ultrasound ordered. This test is most useful when:

    Answer: The ocular media is opaque and the posterior segment cannot be directly viewed

    B-scan ultrasonography creates a cross-sectional image of the eye and is especially valuable when a dense cataract or vitreous hemorrhage prevents direct posterior segment examination.

  5. The Hirschberg light reflex test is used to estimate:

    Answer: The magnitude of a strabismic deviation

    The Hirschberg test estimates ocular alignment by noting the position of a penlight corneal reflex; each 1 mm of decentration equals approximately 15 prism diopters of deviation.

  6. In automated perimetry, a 'false positive' response occurs when:

    Answer: The patient presses the button when no stimulus was presented

    A false positive is recorded when the patient responds during a 'catch trial' with no stimulus, indicating trigger-happy behavior that reduces test reliability.

  7. Which dye is instilled in the eye to evaluate tear film quality and measure tear break-up time (TBUT)?

    Answer: Sodium fluorescein

    Sodium fluorescein is used with cobalt blue illumination to measure the time for the tear film to break up after a blink, with a TBUT under 10 seconds suggesting dry eye.