On Wednesday, during a CNN town hall on climate change, frontrunning Democrat Joe Biden’s eye suddenly filled with blood.

Then came the explanations from liberal sites.

“It’s not clear what caused the incident,” Snopes, a fact-checking site, wrote after ruling the story “true.” “Some news reports speculated that the footage showed the aftermath of a blood vessel bursting in Biden’s eye, something that is relatively quite common and ‘usually harmless,’ according to the American Academy of Ophthalmology. Burst blood vessels in the eye can be caused by straining, coughing or sneezing, but can also be linked to underlying health issues such as high blood pressure, diabetes, or the use of blood-thinning medications. Complications from the use of contact lenses can also cause blood vessels in the eye to break.”

Then came the jokes.

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“There was probably just a broken blood vessel — happens to a lot of people, looks scary, usually harmless,” late night talk show host Stephen Colbert said on Thursday. “Still, Biden can use it to his advantage with a strong new slogan: ‘Biden 2020: Unite Beneath the Eye of Blood.'”

Weirdly, Colbert — who interviewed the 76-year-old Biden on his show Thursday night for 23 minutes — never asked about the bloody eyeball.

Tonight Show host Jimmy Fallon got in on the act, too. “Did you guys see him on CNN’s town hall last night? This is real — it was crazy — he was onstage and he just started bleeding from his eye. … I don’t know if he wants to be president or the next Bond villain.”

But more than 24 hours after the bizarre incident, neither Biden nor his campaign have commented. Biden has written nothing on his Twitter page, and Snopes wrote “we asked Biden’s campaign to clarify what had happened, and what the causes were, but we did not receive a response in time for publication.”

In a non-shocker, CNN didn’t report on the story (even though it happened live on their air) “Neither did MSNBC,” Newsbusters notes. “Neither did ABC, CBS, NBC, or PBS. Even The New York Times and The Washington Post skipped it.”

The Bloody Eye wasn’t Earth-shattering news. But some wondered if it suggested a health problem for Biden. It wasn’t Hillary Clinton collapsing in the September 11 “heat.” But are these media giants that defensive? Deborah Norville and her show Inside Edition reported it, in a non-sensational way, and with a medical expert saying it was absolutely no big deal. It was a little “subconjunctival hemorrhage,” which can suggest high blood pressure, but it usually goes away “all by itself.”

So why hasn’t Biden or his campaign simply explained what happened? Millions of Americans are interested, even concerned. Biden has been a faithful public servant for more than 40 years and people — regardless of political affiliation — want to know if he’s OK.

Very strange. We’ll keep trying to find out what his camp says, so stay tuned.