LOCAL SCIENTIST BACK AT WORK AFTER LOSING VISION - THANKS TO ASSISTIVE TECHNOLOGY In 2018, without warning, Dr Terry Mernagh, suddenly lost a significant part of his vision overnight. He was subsequently diagnosed with non-arteritic anterior ischemic optic neuropathy (NAION). This condition typically causes sudden vision loss, without any pain. In 2019 he also lost some sight in his second eye. Terry is a mineralogist by career, and an Emeritus Associate Professor at the Australian National University. Losing the ability to see compromised his study of mineral deposits, and potentially his career. However, this situation changed when Terry visited a Vision Australia Store in Canberra where he road tested many devices including IrisVision.