Epilepsy
During the nightly news broadcast of 16 November 2006, Lewis previewed the sports segment but was not onscreen when the program returned from the commercial break, with newsreader Bruce Paige instead presenting the sports segment. A similar event occurred two weeks later, on 30 November, when Lewis appeared onscreen and began to read the autocue, saying "Good evening" before seeming distressed. A scheduled report was then played, with Paige delivering the rest of the bulletin. Following these events, Lewis was given medical leave for the rest of the year. The following night, Lewis revealed that he suffered from epilepsy. Lewis has revealed in his book that his on-air disorientation was caused by the condition.
On 21 February 2007, Lewis underwent brain surgery to help his epilepsy at Austin Hospital in Melbourne. The surgery was reported as a success by Gavin Fabinyi, Director of Neurosurgery. He has since made a full recovery.