| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inexpensive tool of a simple structure which prevents a failure, such as a head up, during practice of golf or the like, by narrowing the visual field of a player to enhance the power of concentration. <P>SOLUTION: The method of providing the centers of spectacle lenses with translucent sections and blocking the visual field exclusive of these sections can prevent a failure, such as a head up, during the practice of golf or the like, by narrowing the visual field of the player to enhance the powers of attention. Such purposes are effectively achieved by spectacle lenses which are provided with light shielding sections used by being stuck to the spectacles and are provided with the translucent sections in part thereof to narrow the visual field, or the spectacle lenses which are partially provided with the translucent sections and are coated with an opaque coating material so as to shield the light in the segments exclusive of these sections or the light shielding plates for narrowing the visual field which are attachable and detachable to and from the spectacles partly provided with the translucent sections, or the spectacles for narrowing the visual field which are mounted with the light shielding plates partly provided with the translucent sections at a frame. <P>COPYRIGHT: (C)2004,JPO |
