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Visual Field Testing Flashcards

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

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  1. Which visual field test strategy presents stimuli at threshold levels determined by prior responses, making it more efficient than full threshold testing?

    Answer: SITA Standard

    SITA (Swedish Interactive Thresholding Algorithm) Standard uses statistical modeling to estimate thresholds faster than traditional full threshold strategies.

  2. A patient shows a visual field defect that respects the horizontal midline and corresponds to the inferior retina. This pattern is most consistent with:

    Answer: Altitudinal defect from anterior ischemic optic neuropathy

    Altitudinal defects that respect the horizontal meridian are classic for anterior ischemic optic neuropathy (AION), affecting the superior or inferior half of the field.

  3. On a Humphrey Visual Field printout, what does the Pattern Deviation plot show?

    Answer: Sensitivity values corrected for generalized depression

    The Pattern Deviation plot removes overall sensitivity depression (e.g., from cataract), revealing localized defects more clearly.

  4. Which stimulus size is the standard default for automated static perimetry on the Humphrey Field Analyzer?

    Answer: Goldmann III

    Goldmann Size III (0.43° diameter) is the standard stimulus used for automated threshold perimetry on the Humphrey Field Analyzer.

  5. A patient's visual field shows a defect in the right eye's temporal field and left eye's temporal field simultaneously. This bilateral temporal loss suggests a lesion at the:

    Answer: Optic chiasm

    Bitemporal hemianopia results from compression of the optic chiasm where nasal fibers from both eyes cross, typically caused by a pituitary tumor.

  6. What is the primary purpose of using a blue stimulus on a yellow background (SWAP) in visual field testing?

    Answer: Detect glaucomatous damage earlier by isolating short-wavelength pathways

    Short-Wavelength Automated Perimetry (SWAP) isolates the blue-yellow pathway, which may show deficits earlier in glaucoma than standard white-on-white testing.

  7. During automated perimetry, what is the significance of a high false positive rate (>15%)?

    Answer: The patient is responding when no stimulus is present, making results unreliable

    A high false positive rate indicates the patient is pressing the response button even when no stimulus appears, making the field appear artificially better than it is.