Essex/Aston universities - Turbine trigger seizures

Fast-moving wind turbines can trigger seizures in people sensitive to flickering light. To avoid inducing attacks, turbines should have no more than three blades and rotate no faster than 60 times a minute, according to researchers at Essex and Aston universities. Arnold Wilkins of the University of Essex's psychology department, and Graham and Pamela Harding of Aston University's Neurosciences Institute, calculated different shadow flicker effects to measure the seizure-provoking possibilities. Photosensitive people would also need to be at least 4km away to reduce significantly the possibility of seizures - a distance about 100 times the height of the average turbine.