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Visual snow syndrome

Visual snow syndrome (VSS) (coined by Liu et al in 1995) is a neurological condition in which the primary symptom is persistent flickering white, black, transparent, or colored dots across the entire visual field. It is distinct from the symptom of visual snow itself, which may be caused by multiple ophthalmic and vascular conditions.

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Causes
Unknown, hyperexcitability of neurons and processing problems in the visual cortex
Complications
Poor quality of vision, photophobia, heliophobia, depersonalization and derealization
Differential diagnosis
Migraine aura, persistent aura without infarction, hallucinogen persisting perception disorder
Frequency
Uncommon (understudied)
Medication
Anticonvulsants (limited evidence and success)
Other names
Persistent positive visual phenomenon, visual static, aeropsia

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Overview

Difference from visual snow

Signs and symptoms

Causes

Recent studies

Treatments

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Map overview Semantic statistics

Visual snow syndrome

Nodes83
Edges82
Triples62
Avg. degree1.98
Density0.024096
Components1

How this topic connects Entity context

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Visual snow syndrome

Top relations

related to Common misconceptions · 13
Visual snow syndrome → Additionally, Cones, Eye, For, However, In, It's, Perceiving, Studies, Therefore, These, This, Visual
related to Diagnosis · 10
Visual snow syndrome → At, Enhanced, Normal, Nyctalopia, Palinopsia, Photophobia/photosensitivity, Presence, Symptoms, The, Visual
related to Recent studies · 9
Visual snow syndrome → Goadsby, Importantly, In, In December, In May, In November, In September, Schankin, VSS
has treatment · 8
Visual snow syndrome → As, British Journal, In, It, Medications, Ophthalmology, Vitamins, VSS
related to Difference from visual snow · 6
Visual snow syndrome → However, If, In, This, Visual, VSS
Causes · 1
Visual snow syndrome → Unknown, hyperexcitability of neurons and processing problems in the visual cortex
Complications · 1
Visual snow syndrome → Poor quality of vision, photophobia, heliophobia, depersonalization and derealization
Differential diagnosis · 1
Visual snow syndrome → Migraine aura, persistent aura without infarction, hallucinogen persisting perception disorder
Frequency · 1
Visual snow syndrome → Uncommon (understudied)
Medication · 1
Visual snow syndrome → Anticonvulsants (limited evidence and success)

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Important terminology

visual snow syndrome symptoms migraine may conditions brain phenomenon aura photophobia also patients vss caused common field entoptic study palinopsia

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Visual snow syndromeCausesUnknown, hyperexcitability of neurons and processing problems in the visual cortex1.00infobox
Visual snow syndromeComplicationsPoor quality of vision, photophobia, heliophobia, depersonalization and derealization1.00infobox
Visual snow syndromeDifferential diagnosisMigraine aura, persistent aura without infarction, hallucinogen persisting perception disorder1.00infobox
Visual snow syndromeFrequencyUncommon (understudied)1.00infobox
Visual snow syndromeMedicationAnticonvulsants (limited evidence and success)1.00infobox
Visual snow syndromeOther namesPersistent positive visual phenomenon, visual static, aeropsia1.00infobox
Visual snow syndromeRisk factorsMigraine sufferer1.00infobox
Visual snow syndromeSpecialtyNeurology, neuro-ophthalmology1.00infobox
Visual snow syndromeSymptomsStatic and auras in vision, palinopsia, blue field entoptic phenomenon, nyctalopia, tinnitus1.00infobox
Visual snow syndromeUsual onsetVisual snow can appear at any time, but it commonly appears at birth, late teenage years, and early adulthood.1.00infobox
migraineinstance ofThe presence of comorbidities0.80text
tinnitus are associated with a more severe presentation of visual symptoms.Non-visual symptoms may include difficulty concentratinginstance ofThe presence of comorbidities0.80text

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