Practice Test Geeks(JCAHPO) International Joint Commission Allied Health Personnel in Ophthalmology Practice Test
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Imaging Flashcards

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

Read the first 7 Imaging flashcards as text

  1. Indocyanine green angiography (ICGA) is preferred over fluorescein angiography for evaluating:

    Answer: Choroidal vasculature and polypoidal choroidal vasculopathy

    ICG dye is lipophilic and protein-bound, allowing better penetration of the RPE to visualize choroidal circulation and polypoidal structures.

  2. On a Humphrey visual field test, a 'nerve fiber bundle defect' is characterized by:

    Answer: Arcuate scotoma following the course of nerve fibers

    Nerve fiber bundle defects follow the arcuate pattern of retinal nerve fibers as they course around the macula to the optic nerve.

  3. The purpose of the internal fixation target in a slit-lamp-based OCT is to:

    Answer: Stabilize the patient's gaze on the area of interest

    The internal fixation target helps the patient maintain stable gaze on the desired retinal location to ensure consistent and reproducible scans.

  4. What does RNFL thickness measured by OCT represent?

    Answer: The thickness of the retinal nerve fiber layer containing ganglion cell axons

    RNFL thickness on OCT measures the innermost retinal layer containing ganglion cell axons; thinning indicates glaucomatous or other optic nerve damage.

  5. A patient has a B-scan ultrasound showing high internal reflectivity within a choroidal lesion. This pattern is most consistent with:

    Answer: Choroidal hemangioma

    Choroidal hemangiomas classically show high internal reflectivity on B-scan due to their vascular and fibrous structure, unlike melanomas which are typically low reflective.

  6. Which feature on fluorescein angiography distinguishes classic CNV from occult CNV?

    Answer: Classic CNV shows early well-defined hyperfluorescence with late leakage; occult is poorly defined

    Classic CNV has a well-demarcated lacy hyperfluorescent network early that leaks late, while occult CNV has poorly defined, stippled or fibrovascular pigment epithelial detachment patterns.

  7. In corneal confocal microscopy, which cell type is specifically imaged to assess corneal nerve health?

    Answer: Sub-basal nerve plexus fibers

    Confocal microscopy images the sub-basal nerve plexus in the corneal epithelium, and nerve fiber density/morphology is used to assess neuropathy.