Dyslexia: Treatment through lenses
Stein is currently advocating the use of eye movement exercises for children with unstable vergence. Pavlidis in 1981, also suggested the use of eye movements in following a pattern of moving lights. This test is under development in Greece. More recently Fischer (2000) suggests that visual problems in dyslexia could be treated with a series of eye movement exercises.
These findings support some versions of the Sensory Deficit theories of dyslexia such as Tallal's 'rapid processing' deficit and Stein's 'visual magnocellular' deficit. Retinal ganglion cells are 10% magnocellular (large), which are specialized for fast responses - for timing visual events, detecting visual motion, directing attention, controlling eye movements and fixation & stabilising the eyes. It is known that these magnocells also project to the cerebellum, which may be the cause of dyslexics' problems with balance and some movements
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