A baseball thrown by a pitcher to a batter certainly is “visible”. But seeing it well and reacting to it effectively, having a clear mind, so as to keep it from being “invisible” – which is a hitter’s objective – is certainly one of there most formidable tasks in the sport.
Hitter’s take for granted that they see the ball, but they don’t make the distinction between a casual, fuzzy focus and one that is intense and sharp.
– H.A. Doffman
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