Palinopsia is an uncommon but important neuro-ophthalmic condition. It can present with a range of visual phenomena and may be misdiagnosed as migraine or a functional disorder. The list of possible causes is long and includes structural cerebral lesions. We present a clinical case to illustrate the condition before reviewing different palinoptic subtypes and discussing how these may help clinicians to narrow the differential diagnosis.
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http://dx.doi.org/10.1136/practneurol-2022-003347 | DOI Listing |
Invest Ophthalmol Vis Sci
October 2024
Department of Optometry and Vision Sciences, University of Melbourne, Parkville, Australia.
Purpose: Palinopsia (persistent afterimages and/or trailing) is a common but poorly understood symptom of the neurological condition visual snow syndrome. This study aimed to collect a phenotypical description of palinopsia in visual snow syndrome and probe for abnormalities in temporal visual processing, hypothesizing that palinopsia could arise from increased visibility of normal afterimage signals or prolonged visible persistence.
Methods: Thirty controls and 31 participants with visual snow syndrome (18 with migraine) took part.
Eur J Neurol
December 2024
Dipartimento Universitario di Neuroscienze, Università Cattolica del Sacro Cuore, Rome, Italy.
Background: Visual snow (VS) and visual snow syndrome (VSS) are becoming increasingly recognized. However, their prevalence worldwide is unknown. This study aimed to investigate lifetime prevalence and describe the clinical characteristics of VS and VSS in a representative population sample from Italy.
View Article and Find Full Text PDFNeurol Perspect
December 2023
Department of Neurology, University Hospital "12 de Octubre", Madrid, Spain.
J Clin Med
February 2024
Department of Neurology, Wroclaw Medical University, Borowska 213, 50-556 Wroclaw, Poland.
Visual snow syndrome (VSS) is a rarely diagnosed neurological phenomenon. It is a visual disorder characterised by the presence of numerous white, black, or translucent dots in the visual field, resembling the 'snow' of an analogue TV set experiencing reception interference. According to The International Classification of Headache Disorders, 3rd edition, visual snow is defined as a pattern of continuous small dots across the visual field lasting >3 months and accompanied by at least two of the following four additional symptoms: palinopsia, increased entoptic phenomena, photophobia, and nyctalopia.
View Article and Find Full Text PDFCureus
February 2024
Obstetrics and Gynecology, Marshall University Joan C. Edwards School of Medicine, Huntington, USA.
Normal pressure hydrocephalus (NPH) is characterized by pathologic ventriculomegaly with normal opening pressures on lumbar puncture. It commonly presents with a triad of gait disturbance, cognitive impairment, and urinary bladder detrusor dysfunction. Its pathogenesis is complex but is thought to arise in the setting of imbalanced cerebrospinal fluid (CSF) secretion and absorption.
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