Neuro-Ophthalmic Disorders & Visual Function Testing Flashcards
7 cards from real CO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Neuro-Ophthalmic Disorders & Visual Function Testing flashcards as text
A patient reports seeing halos around lights at night and has a relative afferent pupillary defect. The most likely diagnosis is:
Answer: Optic neuritis with asymmetric optic nerve disease
An RAPD indicates asymmetric optic nerve or retinal disease; halos plus RAPD together may suggest acute glaucoma or optic neuropathy causing both symptoms.
In a patient with suspected functional (non-organic) visual field loss, which test finding is most helpful?
Answer: Tubular or spiral field defect on kinetic perimetry
A tubular or spiral field defect—where the field fails to expand with increasing test distance—is a classic sign of non-organic visual field loss on kinetic perimetry.
The Lancaster red-green test is used primarily to:
Answer: Measure the size and direction of ocular deviations in different gaze positions
The Lancaster red-green test maps ocular deviations in nine positions of gaze, helping localize which extraocular muscle or nerve is paretic.
Which feature best differentiates optic neuritis from anterior ischemic optic neuropathy (AION) in an acute presentation?
Answer: Pain with eye movement present in optic neuritis but not AION
Periocular pain that worsens with eye movement is characteristic of optic neuritis (inflammatory) and is typically absent in AION (ischemic).
A 30-year-old woman with pseudotumor cerebri (idiopathic intracranial hypertension) is most likely to complain of which ocular symptom?
Answer: Transient visual obscurations lasting seconds
Transient visual obscurations—brief greying or blackouts of vision lasting seconds, often triggered by postural changes—are the classic visual symptom of IIH.
The Farnsworth-Munsell 100-hue test evaluates:
Answer: Color discrimination ability across the entire hue circle
The FM 100-hue test assesses the ability to arrange colored caps in chromatic order across the full hue circle, detecting subtle color discrimination deficits.
A patient with a right CN VI palsy will demonstrate maximum esotropia when gazing to the:
Answer: Right
CN VI innervates the ipsilateral lateral rectus; a right CN VI palsy prevents right abduction, causing maximum esotropia (convergent deviation) in right gaze.