If he gets corrective lenses, you don't think something 60 feet away would be clearer? As someone who is also nearsighted, i can tell you that when i put my glasses on, i can see MUCH better at those distances, at much greater detail. They identified that he is nearsighted, so if they correct his vision, he should be able to see greater detail(i.e. the spinning of the ball as it approaches) farther away than he would without corrective lenses/lasik.