Poor Bob Costas has been a trooper for the first few days of the Olympics in Sochi...after contracting some weird eye disease.  It has spread to the other eye and he has now been replaced by Matt Lauer...for the time being, at least.  Bob tried in vain to overcome the eye fungus, and to power through, but that obviously isn't happening.

Meanwhile, the Internet is reacting to the eye situation, and Twitter especially has come up with some great responses to his problem.

See all the tweets --> BUZZFEED