A woman has been diagnosed with a rare brain condition that causes her eyes to unpredictably "switch off". Shannen Broodryk was travelling on the M25 when she suddenly couldn't see, but narrowly avoided tragedy by miraculously pulling over onto the hard shoulder.
The 28-year-old, who had complained of headaches and blurred version before, was referred to an eye hospital where she was diagnosed with idiopathic intracranial hypertension (IIF) that causes excess tension on the brain.
Recalling the traumatic incident, Shannen said: "I was on my way back from Oxford and I lost my vision whilst I was driving. I could see a mixture of light but had no idea what was in front of me.
