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E. M. Aring, S. Andersson, A. Hellström, J. Ygge; Abnormal Fixation Behaviour in Children With Hydrocephalus. Invest. Ophthalmol. Vis. Sci. 2007;48(13):953.
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To compare fixation behaviour at school age in children with hydrocephalus (HC) and age- and sex- matched group of healthy controls.
As a part of a multidisciplinary study an infrared eye-tracking device (Orbit) was used to analyse binocular fixation behaviour in 35 children with hydrocephalus and 117 healthy controls.
Relative to the controls, children with HC had significant shorter fixation time (p=0.005) and did significant more drifts (p<0.01). The controls, but not the HC children, showed an increase in fixation time (p=0.02) and decrease in number of intruding saccades (p<0.01) with increasing age. However, children with HC showed an increase in number of drifts (p=0.002) and blinks (p=0.03) with increasing age, while the controls showed no such age correlation. A lower blink frequency ((p=0.02) was seen among children born with HC, while children developing HC during first year of life had an increase in number of drifts and blinks with increasing age.
Children with hydrocephalus had significant shorter fixation time and did more drifts compared to age- and sex-matched controls. With increasing age all investigated variables (fixation time, drifts, blinks and saccades) differed between the two groups.
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