A portable eye testing kit based on a smartphone that could revolutionize eye care in the world's poorest nations is being tested in Africa by UK researchers. The kit is a mobile app, together with clip-on hardware, that transforms a smartphone into a low-cost portable eye clinic that can be operated by a non-expert to gather detailed clinical information, diagnose cataracts, check prescriptions for vision lenses, and even check the retina for signs of disease. Globally, there are 285 million people with impaired vision, 39 million of whom are blind, World Health Organization. To see more details visit, www.medicalnewstoday.com