Familial cold-induced transient diplopia.
BACKGROUND
The major precipitants of intermittent diplopia secondary to a phoria breakdown include fatigue and illness.


OBJECTIVE
To describe cold-induced vertical diplopia in a mother and daughter.


METHODS
Retrospective report.


RESULTS
Mother and daughter both developed vertical diplopia after exposure to cold ambient temperatures. These symptoms remained stable over many years. Ocular motility examination suggested that the diplopia resulted from breakdown of a small vertical phoria.


CONCLUSIONS
Familial cold-induced vertical diplopia is a rare disorder of unclear etiology that need not be associated with underlying systemic disease.
Luneau
Katie
K
Department of Ophthalmology, Centre Hospitalier de l'Universite de Montreal, Montreal, Quebec, Canada.
Blais
Claire
C
Brodsky
Michael
M
Boghen
Dan
D
D000328:Adult; D000368:Aged; D003080:Cold Temperature / Q000009:adverse effects*; D004172:Diplopia / Q000453:epidemiology* / Q000235:genetics / Q000503:physiopathology; D004215:Distance Perception / Q000502:physiology; D005260:Female; D005500:Follow-Up Studies; D020022:Genetic Predisposition to Disease; D006801:Humans; D012189:Retrospective Studies; D012720:Severity of Illness Index