Practice Test GeeksCOT - Certified Ophthalmic Technician Practice Test
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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.

Read the first 7 Visual Field Testing flashcards as text

  1. The 10-2 visual field test pattern is specifically designed to test points within what degree of fixation?

    Answer: 10 degrees

    The 10-2 program tests a 10° × 10° grid centered on fixation with points spaced 2° apart, making it ideal for monitoring central field in conditions like macular degeneration or advanced glaucoma.

  2. Which of the following best describes the physiologic blind spot on a visual field test?

    Answer: An absolute scotoma approximately 15° temporal to fixation corresponding to the optic disc

    The physiologic blind spot is an absolute scotoma located approximately 15° temporal to fixation where the optic disc has no photoreceptors.

  3. A patient shows a superior altitudinal visual field defect. The most likely cause is:

    Answer: Inferior branch retinal artery occlusion or inferior optic nerve damage

    Superior altitudinal defects (loss of the upper field) result from damage to inferior retinal structures or the inferior optic nerve, often from inferior BRAO or inferior AION.

  4. During automated perimetry, fixation losses are detected by periodically presenting stimuli at the:

    Answer: Blind spot location

    The Heijl-Krakau method projects stimuli into the patient's mapped blind spot; if the patient responds, it indicates they are not maintaining proper fixation.

  5. What is the clinical significance of the Pattern Standard Deviation (PSD) on a Humphrey Field Analyzer printout?

    Answer: It quantifies the irregularity or focal nature of the field loss

    PSD measures the variability of individual test point deviations from the age-corrected average, with elevated PSD indicating focal or localized loss characteristic of glaucoma.

  6. Which visual field defect pattern is most characteristic of a lesion in the parietal lobe optic radiations?

    Answer: Superior homonymous quadrantanopia ('pie on the floor')

    Parietal lobe lesions damage the superior optic radiations, producing a contralateral inferior homonymous quadrantanopia (superior fibers run through the parietal lobe).

  7. A confrontation visual field test is considered:

    Answer: A gross screening test that detects large field defects but misses subtle losses

    Confrontation testing is a quick clinical screening tool that reliably detects large hemianopias or quadrantanopias but lacks the sensitivity to identify early or subtle field defects.