The Peek app is an eye exam tool that uses the camera of a smartphone to scan and illuminate the eye.

According to the World Health Organization, about 90% of the world's visually impaired people reside in developing countries where although treatment is available in the cities and major towns, it is often difficult for those living in the remote areas to access eye care providers and get diagnosed.

Dr. Andrew Bastawrous of the London School of Hygiene and Tropical Medicine and his colleagues of experts in research, technology, and, of course, eye care have developed a smartphone app that can be used to conduct eye exams in any environment.

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