Patent ID: 6942336

Claim:
A training aid comprising: an eyeglass frame having a pair of transparent lenses, each lens having an upper and lower region; and an opaque layer of film adhering to each of said transparent lenses, the opaque layer of film on at least one of said lenses covering at least part of the lower region thereof while leaving the upper region thereof uncovered and transparent; in which each said lens has a lower edge, in which each of said film layers has a width extending from a rightmost part thereof to a leftmost part thereof, and a lower edge extending across substantially the entire width of the film layer, the lower edge of each film layer conforming in shape to, and coinciding with, the lower edge of the lens to which it adheres; and in which each of said film layers has an upper edge extending across substantially the entire width thereof, said upper edge being convex upwardly, whereby the film layers obscure a vertically higher portion of the central part of the visual field than of the left and right portions of the visual field.