Thursday, December 24, 2009

Color Changing Contact Lens with Nanoparticles Warn Diabetics of Glucose Dangers, Canadian Researcher's Discovery Replaces the Need to Draw Blood

Diabetics may soon be able to wear contact lenses that continuously alert them to variations in their glucose levels by changing colors – replacing the need to routinely draw blood throughout the day.

The non-invasive technology, developed by Chemical and Biochemical Engineering Professor Jin Zhang at The University of Western Ontario (London, ON), uses extremely small nanoparticles embedded into the hydrogel lenses.  These engineered nanoparticles react with glucose molecules found in tears, causing a chemical reaction that changes their color.

Zhang received $216,342 from the Canada Foundation for Innovation (CFI) to further develop technologies using multifunctional nanocomposites. 

These technologies have vast potential applications beyond biomedical devices, including for food packaging. For example, nanocomposite films can prevent food spoilage by preventing oxygen, carbon dioxide and moisture from reaching fresh meats and other foods, or by measuring pathogenic contamination; others can make packaging increasingly biodegradable.

Overall, Western was awarded $2,659,595 for 12 projects from the CFI’s Leaders Opportunity Fund today.

For more, please visit:
Contact: Jin Zhang, Department of Chemical and Biochemical Engineering, 519-661-2111 ext. 88322,

Douglas Keddy, Research Communications Coordinator, 519-661-2111 ext. 87485,

The Canada Foundation for Innovation (CFI) is an independent corporation created by the Government of Canada to fund research infrastructure. The CFI’s mandate is to strengthen the capacity of Canadian universities, colleges, research hospitals, and non-profit research institutions to carry out world-class research and technology development that benefits Canadians. Since its creation in 1997, the CFI has committed almost $5.2 billion in support of more than 6,300 projects at 130 institutions in 65 municipalities across Canada.

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