Patent ID: 7328997

Claim:
A method of training an individual in fielding and hitting baseballs or softballs, in which said individual is caused to wear a training aid comprising: an eyeglass frame having a pair of lenses, each lens having a transparent upper region and an opaque lower region; the opaque lower region of each of said lenses having an upper boundary at which it meets the transparent upper region of the lens, said boundary being concave; whereby the sides of the visual field of a user of the training aid are occluded to a greater degree than the central part of the user's visual field, the training aid being positioned on the individual's face with the lowermost parts of said upper boundaries of the opaque lower regions of the lenses at a height such that, when the individual is standing on a level playing field and the individual's head is held erect, the individual can see, in the central part of the visual field, portions of the playing field more than approximately twenty-five feet from the individual's feet, but is prevented from seeing portions of the playing field less than approximately twenty five feet away from the individual's feet unless he tilts his head down, and in which baseballs or softballs are projected toward said individual for fielding or hitting.