PURPOSE: To characterize eye movements made by @entity1 with intermittent @entity5770 when fusion loss occurs spontaneously and to compare them with those induced by covering 1 eye and with strategies used to recover fusion. DESIGN: Prospective study of a @entity1 cohort referred to our laboratory. @entity1 : Thirteen @entity1 with typical findings of intermittent @entity5770 who experienced frequent spontaneous @entity393 . METHODS: The position of each eye was recorded with a video eye tracker under infrared illumination while fixating on a small central near target. MAIN OUTCOME MEASURES: Eye position and peak velocity measured during spontaneous @entity393 , shutter-induced @entity393 , and recovery of fusion. RESULTS: In 10 of 13 subjects, the eye movement made after spontaneous @entity393 was indistinguishable from that induced by covering 1 eye. It reached 90% of full amplitude in a mean of 1.75 seconds. Peak velocity of the deviating eye's movement was highly correlated for spontaneous and shutter-induced events. Peak velocity was also proportional to @entity5770 amplitude. Recovery of fusion was more rapid than @entity393 , and often was accompanied by interjection of a disconjugate saccade. CONCLUSIONS: Loss of fusion in intermittent @entity5770 is not influenced by visual feedback. Excessive divergence tone may be responsible, but breakdown of alignment occurs via a unique, pathological @entity1319 that differs from a normal, physiological divergence eye movement.

Capturing the Moment of Fusion Loss in Intermittent XXXX .

@entity1 :: ('9606', 'Species') :: ['patients', 'patient', 'PARTICIPANTS'] @entity393 :: ('MESH:D034381', 'Disease') :: ['loss of fusion'] @entity5770 :: ('MESH:D005099', 'Disease') :: ['exotropia'] @entity1319 :: ('MESH:D015835', 'Disease') :: ['type of eye movement']
@entity5770 :: (MESH:D005099,Disease) :: ['Exotropia']
