A rapid, non-invasive eye exam that uses innovative imaging technology effectively measures the severity of disease in patients with a rare neurodegenerative disease called Friedrich ataxia, according to a study by Weill Cornell Medicine, Weill Cornell Medicine-Qatar and NewYork-Presbyterian researchers. The results suggest that the exam, known as corneal confocal microscopy (CCM), could be a rapid and sensitive tool for assessing patients in the clinic and act as a biomarker in clinical trials testing new therapies for the disease.