Visibility enough to see your feet? What's the problem?
Now, what's really cool is when you get a whiteout, where the sunlight is diffused so that the light is coming from all directions, meaning that there are no shadows. Now in places with lots of color this might not mean much, but when we had partial whiteout conditions at the South Pole station one day, I found myself able to clearly see the elevated station about a mile away, but I had to be very careful when walking that I didn't step into a hole that I couldn't see.