Visual tracking, optokinetic aging

John.Harrison at John.Harrison at
Sat Mar 28 14:59:24 EST 1998

So why aren't all old people dyslexic?????

On 26 Mar 1998 11:55:48 -0000, Michael Hogan <Michael.Hogan at UCG.IE>

>Have any of you come across any studies which have looked at 
>optokinetic tracking and the blurring speed (visual tracking limits) 
>in the elderly population.  Lewinson (1990) used a 3-D optical 
>scanner (basically a projector) to test the blurring speed of young 
>dyslexic and non-dyslexic groups.  He suggested that this tracking 
>ability was a measure of cerebellar functioning and found it to 
>correlate with measures of Romberg balance.  Also, both cerebellar 
>abilities had discriminative validity and distinguised dyslexic and 
>non-dyslexic groups.
>Aging is associated with declines in balance and visual tracking (if 
>you want references ask me, I'll send you a chapter).  But I have not 
>found studies which specifically use the blurring speed methodology.
>Have any of you?
>Give us a hand here folks.
>Mike Hogan.  Ireland.

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