Using the compound eyes of the humble moth as their inspiration, an international team of physicists has developed new nanoscale materials that could reduce the radiation dosages received by patients getting X-rayed, while improving the resolution of the resulting images……

http://www.nanomagazine.co.uk/index.php?option=com_content&view=article&id=1747:nanostructures-modeled-on-moth-eyes-may-enhance-medical-imaging&catid=38:nano-news&Itemid=159