Focus is not achieved by staring hard at something. It is not trying to force focus, nor does it mean thinking hard about something. Natural focus occurs when the mind is interested. When this occurs, the mind is drawn irresistibly toward the object (or subject) of interest. It is effortless and relaxed, not tense and overly controlled. When watching the tennis ball, allow yourself to fall into focus. If your eyes are squinting or straining, you are trying too hard. If you find yourself chastising yourself for losing focus, then you may be overcontrolling.
