Mythmaking?

The newspaper scribe Jenni Murray was blaming her fat jabs for suddenly seeing flashes of light. But one of my correspondents, who doesn’t need to slim, experienced the same thing decades ago.
    He was told it was a detached vitreous body in the eye bashing the retina and the light flashes were a response to the impacts. And in most cases, such as his, no damage is done and the flashes stop as mysteriously as they began.