With 30 million drivers in the US aged 65 and over, we count on older Americans to recognize when they can no longer drive safely and decide that it's time to stay off the road. A new study finds that a decrease in vision function is a key factor in bringing about this decision.

The research, by QBI neuroscientist Professor Jason Mattingley and colleagues at the University of Melbourne and University College London, has implications for understanding "spatial neglect", a disorder associated with damage to the brain's parietal lobe - an area that plays an important role in integrating sensory information from various parts of the body, and in planning eye- and limb-movements.

Middle-aged men and women with a history of migraine and other headaches are more likely to have retinopathy, damage to the retina of the eye which can lead to severe vision problems or blindness, than those without a history of headaches, according to a study from the University of North Carolina at Chapel Hill.