Eyesight tests could predict which people with Parkinson's will develop dementia 18 months on

Daily Mail - Science & tech 

Eyesight tests could be used to identify which people with Parkinson's disease are likely to suffer from cognitive impairment and possible dementia 18 months later. UK researchers have found that people with Parkinson's who perform less well in eye tests show worse cognitive performance a year and a half later. The study is one of two by University College London (UCL) published this month looking at people with Parkinson's – the progressive nervous system disorder that causes shakiness and stiffness. The second study found structural and functional connections of brain regions become'decoupled' throughout the entire brain in people with Parkinson's disease, particularly among people with vision problems. The findings support previous evidence that vision changes precede the cognitive decline that occurs in many, but not all, people with Parkinson's.