# 4 Colour Changing Contact Lenses To Aid Diabetic Patients

For diabetic patients, drawing blood to check their glucose level is a must- do activity on a daily basis. Not all of them like to do it. However, using nanoparticles, contact lenses have been created which can detect the amount of glucose in tears. These hydrogel lenses undergo a chemical reaction which causes them to change colour, based on the amount of glucose present in their body. It was developed by Professor Jin Zhang at the University of Western Ontario. But you will still need that painful prick to produce tears.

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#3 App To Help The Homeless

A direct result of the U.S. Economic recession was its impact on housing. Unable to pay their mortgages, many people became homeless. To help them, the 100,000 Homes Campaign devised an app, Homeless Connector. Citizens can download the app, which is survey based, and question their community members on their current situation. It aims to find permanent housing for individuals and groups and ultimately decrease homelessness in the country.

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