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 instrument measures intraocular pressure by applanating a small area of the cornea?

    Answer: Goldmann applanation tonometer

    The Goldmann applanation tonometer is the gold standard for measuring IOP by flattening a 3.06 mm diameter area of the cornea.

  2. During a visual field test using automated perimetry, a 'fixation loss' means the patient:

    Answer: Looked away from the fixation target

    Fixation loss occurs when the patient looks away from the fixation target, causing the instrument to detect a response in the known blind spot location.

  3. What does the 'cup-to-disc ratio' (C/D ratio) assess when evaluating the optic nerve?

    Answer: The proportion of the optic cup diameter to the optic disc diameter

    The C/D ratio compares the diameter of the central cup to the total diameter of the optic disc, with larger ratios potentially indicating glaucoma.

  4. A corneal topography map uses colors to represent corneal curvature; warmer colors (red/orange) typically indicate:

    Answer: Steeper curvature with shorter radius

    On standard topography maps, warm colors (red, orange) represent steeper corneal areas, while cool colors (blue, green) represent flatter areas.

  5. When performing a cover-uncover test, the uncovered eye is observed to detect:

    Answer: A tropia (manifest deviation)

    During the cover-uncover test, movement of the uncovered eye reveals a manifest strabismus (tropia), while the alternate cover test reveals phorias.

  6. Pachymetry is used to measure:

    Answer: Corneal thickness

    Pachymetry measures corneal thickness, which is important for glaucoma risk assessment and pre-refractive surgery evaluation.

  7. In retinal photography, a red-free (green) filter is used primarily to:

    Answer: Enhance visualization of the nerve fiber layer and blood vessels

    Red-free filters block red wavelengths and enhance contrast of the retinal nerve fiber layer, blood vessels, and hemorrhages against the background.