Is there a Viagra-blindness link:
The Food and Drug Administration (FDA) has identified 50 cases of the condition, which can occur in men with heart disease or diabetes.
The FDA says it has as yet found no evidence that Viagra is to blame for the condition.
More than 20 million men worldwide have used the drug since its launch in 1998.
A spokesman for Pfizer, the makers of the drug, said the company was considering changing its warning on the drug label.
"We are in discussions with the FDA to update our language to reflect these rare ocular events that have occurred," said Daniel Watts.
He said that men who took Viagra often already had those types of diseases that could cause blindness.
Just about everybody is referring to this as a probe. What we men won't do for love.