Vision test keeps the others away... until they want to confirm their results by taking a closer look at the lines they had trouble with seeing.
So get swarmed!
@ryanzc. She wanted to buy a mask for protection against the coronavirus but couldn't get one. The seller recommended that shirt and people will willingly keep their distance so that they can take the test hence solving her worries of catching the virus. This is just a way to reinforce the idea of social distancing.