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Neuro Ophthalmology Glossary

100 terms total — 24 showing — Last updated 15 Sep 2026

hemianopsia

Intermediate Technical IVT

Loss of vision in half of the visual field of one or both eyes.

Showing 49–72 of 100

mydriasis

Intermediate Technical IVT

Abnormal dilation of the pupil that may be pharmacological, neurological, or pathological in origin.

Technical Term Full entry →

NAION

Professional Technical IVT

Non-arteritic anterior ischemic optic neuropathy; sudden vision loss due to ischemia of the optic nerve head.

Abbreviation Full entry →

neuro-ophthalmic examination

Intermediate Technical IVT

Comprehensive assessment combining neurological and ophthalmological techniques to evaluate visual and ocular motor dysf...

Clinical Procedure Full entry →

nystagmus

Intermediate Technical IVT

Involuntary rhythmic oscillation of the eyes that can indicate neurological or vestibular pathology.

Technical Term Full entry →

OCT

Intermediate Technical IVT

Optical coherence tomography, a non-invasive imaging technique that provides cross-sectional views of retinal and optic...

Abbreviation Full entry →

ocular flutter

Professional Technical IVT

Spontaneous horizontal saccadic oscillations without intersaccadic intervals.

Technical Term Full entry →

ocular tilt reaction

Advanced Technical IVT

Triad of head tilt, skew deviation, and ocular torsion resulting from otolith pathway dysfunction in the brainstem.

Clinical Sign Full entry →

one-and-a-half syndrome

Professional Technical IVT

Horizontal gaze palsy with ipsilateral internuclear ophthalmoplegia from pontine lesion.

Technical Term Full entry →

opsoclonus

Professional Technical IVT

Chaotic, multidirectional saccadic eye movements often associated with myoclonus.

Technical Term Full entry →

optic atrophy

Intermediate Technical IVT

Degeneration or loss of optic nerve fibers resulting in pallor of the optic disc.

Technical Term Full entry →

optic coherence tomography angiography

Professional Technical IVT

Non-invasive imaging technique using OCT technology to visualize retinal and optic nerve head vasculature without contra...

Diagnostic Test Full entry →

optic disc drusen

Professional Technical IVT

Calcified deposits within the optic nerve head that can mimic papilledema and cause visual field defects.

Technical Term Full entry →

optic neuritis

Intermediate Technical IVT

Inflammation of the optic nerve typically causing acute vision loss, eye pain, and often associated with multiple sclero...

Technical Term Full entry →

optical coherence tomography

Intermediate Technical IVT

High-resolution cross-sectional imaging technique that uses light waves to visualize retinal and optic nerve structure.

Diagnostic Test Full entry →

optokinetic nystagmus

Intermediate Technical IVT

Involuntary eye movements elicited by moving visual stimuli, used to assess visual function.

Technical Term Full entry →

optokinetic reflex

Advanced Technical IVT

An involuntary eye movement response to large-field moving visual stimuli, consisting of slow pursuit followed by fast r...

Technical Term Full entry →

oscillopsia

Intermediate Technical IVT

Visual symptom of apparent movement or oscillation of the environment, often associated with vestibular or eye movement...

Technical Term Full entry →

palinopsia

Advanced Technical IVT

Visual phenomenon where images persist or recur after the stimulus has been removed, indicating cortical visual processi...

Technical Term Full entry →

papilledema

Intermediate Technical IVT

Bilateral optic disc swelling caused by increased intracranial pressure.

Technical Term Full entry →

Parinaud syndrome

Professional Technical IVT

Dorsal midbrain syndrome causing vertical gaze paralysis and pupillary abnormalities.

Technical Term Full entry →

PERG

Professional Technical IVT

Pattern electroretinogram, a specialized test measuring retinal ganglion cell function important in optic nerve disease...

Abbreviation Full entry →

perimetry

Intermediate Technical IVT

The systematic measurement and mapping of visual field sensitivity using standardized test procedures and equipment.

Technical Term Full entry →

phoria

Intermediate Technical IVT

A latent eye misalignment that is normally controlled by binocular fusion but becomes apparent when fusion is disrupted.

Technical Term Full entry →

photoreceptor

Intermediate Technical IVT

Specialized retinal cells (rods and cones) that detect light and initiate the visual transduction process.

Technical Term Full entry →
Showing 49–72 of 100

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