Talented and famous dyslexics
There are many, many examples of superbly successful dyslexics in all walks of life, eg. Albert Einstein, Winston Churchill, Hans Christian Andersen, Richard Branson, possibly even Leonardo da Vinci. Probably their mild genetically endowed impairment of magnocellular development was balanced by superior connectivity of other nerve cells in the brain, such as parvo cells.
During development of the brain, neurones compete with each other for connections, hence dyslexics’ disadvantaged magnocells may lose out to stronger parvo cells. But this allows the parvo cells to make stronger and more numerous connections. Thus dyslexics may often have better parvo functions than good readers, such as superior colour sense and better holistic visuospatial perception. This may explain why so many dyslexics have exceptional artistic, engineering and entrepreneurial talents, since these depend on being able to perceive connections that others don’t see so easily. Dyslexia is not all gloom and misery!