Very sorry about your co-worker, Morticia. Thanks for sending out the warning.
It goes for macular degeneration, too. Not so serious as cancer, but it destroys sight, sometimes very rapidly. But new studies show that large doses of zinc and lutein often can help to stabilize if not reverse. I went for exam when I noticed I could no longer clearly see the red digital clock numbers with my left eye, only my right. Diagnosed about 2 years ago and have been taking supplements and eating lots of chard/spinach/romaine, all very high in lutein. No reversal, but no worse either. I go in for a check Thurs. and will be holding my breath.