At 5:00 pm, the snow outside makes everything bright, so he wears snow goggles on his way back home, or his eyes may be hurt badly by the strong light.
They have a point: if poorer countries were forced to bring labour laws up to rich-country standards overnight, their exports would fall and their economies would bebadlyhurt.
However, many NFL players have claimed that they suffer from a variety of injuries because of concussions without really knowing the severity of how badly they could behurt playing the game.