If you’ve tuned into NBC’s coverage of the Olympics, you likely noticed something is wrong with sportscaster Bob Costas’ eye — and now both of his eyes. The infection has spread.

Bob Costas began exhibiting the symptoms of pink eye Thursday. By Monday, it appeared as if the infection had spread to both eyes. (Image source: @SBNationGIF/Twitter)

Bob Costas began exhibiting the symptoms of pink eye Thursday. By Monday, it appeared as if the infection had spread to both eyes. (Image source: @SBNationGIF/Twitter)

An infection was evident as early as Thursday last week. Deadspin learned at the time through an NBC representative that he was unable to where contact lenses as a result and resorted to his round tortoise shell glasses.

“It just came on within the last 24 hours, the NBC doctors in Sochi are treating it, and they think it should resolve itself by the weekend. Until then, he has no choice but to go with the glasses on air,” the representative told Deadspin.

Costas during his broadcast Thursday also addressed the issue, saying it was pink eye:

“Bear with me for a moment as I spare my friends in the press office countless inquiries. I have no choice to go all ‘Peabody and Sherman’ on you for the next couple of nights since I woke up this morning with my left eye swollen shut and just about as red as the old Soviet flag.”

This picture for comparison purposes shows Costas' eyes clear and free from infection.  (AP/Evan Agostini, File)

This picture for comparison purposes shows Costas’ eyes clear and free from infection. (AP/Evan Agostini, File)

Conjunctivitis is highly contagious and can easily spread from one eye to the other, as it appeared to have done by Monday.

Many on Twitter took notice of Costas’ unfortunate situation.

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In addition to receiving traditional medical attention, Costas could be self-medicating as well.

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In the clip Monday night, Costas admitted that he’s “not much of a vodka guy.”

“I’m looking at it this way though,” he continued. “My eyes can’t get any redder no matter what I do.”

“You know what, I’ll drink to that,” fellow NBC sportscaster Mary Carillo said.

Watch the clip:

As a result of the worsening infection, Costas announced Tuesday that he would turn the reigns over to Matt Lauer, at least for the night.

“Reluctantly, I was trying to throw a complete game here, but we’re going to have to go to the bullpen, and I don’t know if you’re aware of this tonight, but you’re Mariano Rivera, at least tonight,” Costas told Lauer with NBC’s Today Show over the phone. “Let’s hope it’s only tonight. I’m walking around, I might as well be playing ‘Marco Polo.’ I have no idea where I am.”