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Glaucoma Diagnosis and Management Flashcards

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

Read the first 7 Glaucoma Diagnosis and Management flashcards as text

  1. A highly myopic patient with a tilted optic disc shows borderline RNFL thinning flagged 'red' on OCT but has full visual fields and a stable disc. What best explains this finding?

    Answer: A false-positive ('red disease') from comparison to a normative database that excludes high myopes

    Normative databases usually exclude high myopes, so tilted discs and shifted RNFL peaks often produce false-positive 'red' flags.

  2. After myopic LASIK, how does Goldmann applanation tonometry most likely misreport a patient's true IOP?

    Answer: It underestimates IOP because of the thinner, weaker central cornea

    Central corneal thinning and changed biomechanics after LASIK cause GAT to underestimate true IOP.

  3. On gonioscopy, a narrow angle shows no visible structures. What technique best tells appositional closure apart from peripheral anterior synechiae?

    Answer: Dynamic indentation gonioscopy with a Zeiss-type four-mirror lens

    Indentation pushes aqueous peripherally and opens appositionally closed angles; synechial areas stay closed.

  4. A glaucoma patient has a disc hemorrhage and a dense superior arcuate defect close to fixation. Which visual field test best defines central involvement?

    Answer: Humphrey 10-2

    The 24-2 grid (6° spacing) can miss paracentral damage, which the 10-2 (2° spacing) shows much better.

  5. In the Ocular Hypertension Treatment Study (OHTS), which baseline factor was a strong independent predictor of conversion to POAG?

    Answer: Thinner central corneal thickness

    OHTS found that thinner CCT, older age, higher IOP, larger cup-to-disc ratio, and higher PSD predicted conversion.

  6. According to the ISNT rule for a healthy optic disc, which neuroretinal rim is normally thickest?

    Answer: Inferior

    Normal rim thickness usually runs Inferior ≥ Superior ≥ Nasal ≥ Temporal.

  7. A young myopic man has midperipheral radial iris transillumination defects, a Krukenberg spindle, and a very open angle with concave peripheral iris. What is the proposed mechanism of his condition?

    Answer: Reverse pupillary block with iris-zonule rubbing that releases pigment

    In pigment dispersion syndrome, posterior iris bowing (reverse pupillary block) rubs the iris pigment epithelium against the zonules.