'Singing astronaut' Chris Hadfield blinded on spacewalk

Canadian astronaut Chris Hadfield recalls how on his first spacewalk "suddenly my left eye went blind" when his tears became contaminated inside his spacesuit.

"It's not what you want to have happen" he said recalling how he was "holding on to the outside of a spaceship blind," he said.

The situation, caused by the anti-fog covering on the inside of his visor, was resolved when he released oxygen from his suit and his eyes had dried up.

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