I wore contacts when I went to umpire school in 1985, but quickly abandon them when I got home because it's so windy around here in the Spring that I had more dust in my eyes than light coming in. I've worn glasses ever since, with no problems other than the fact that they occasionally fog up on a hot, muggy night.
I wore no-line bifocals for two seasons with no problems - I, too, had the concern of distortion, but it was no problem to see things clearly. I went back to regular vision glasses simply because they served my purpose just fine and were considerably cheaper than bifocals.
The one noticeable advantage with the no-line bifocals was I could actually read the lineup cards!
JJ
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