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  • Title: Smooth pursuit eye movements in normal and dyslexic children.
    Author: Black JL, Collins DW, De Roach JN, Zubrick SR.
    Journal: Percept Mot Skills; 1984 Aug; 59(1):91-100. PubMed ID: 6493958.
    Abstract:
    This paper describes a detailed study of horizontal eye movements associated with visual tracking of a smoothly moving target. Essentially all children, even at target velocities as low as 5 degrees/sec., show some saccadic eye movements superimposed on smooth tracking movements. Detailed analysis of pursuit eye-movements from a group of 26 poor readers and 34 normal controls (8 to 13 yr.) showed that about 25% of poor readers have an abnormally raised saccadic component in smooth pursuit. This suggests that studies of eye movements during tracking of smoothly moving targets at low velocity, combined with a quantitative approach to data analysis, may be useful for early detection of a significant proportion of poor-reading children.
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