| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a subjective sight correction device, achieving various adaptation for quick correction of sight without words by using the appearance of a single spot of light (virtual image) to determine the utmost values specific to an examinee for such improvement as to eliminate non-adaptable examinees, and solve inconvenience of conventional methods such as the use of the Landolt ring. <P>SOLUTION: The device comprises a set of test lenses 3, a set of stepping stopper magnets 5, an attracting magnet 6 for stabilizing, a rotary shaft 11, and a manually rotatable handle 7 provided around a disk 1. Smooth rotation is thus achieved while the disk is stably and tightly attached to a base seat, so that all the test lenses (one set) are watched at a time. They are made simply attachable and detachable. <P>COPYRIGHT: (C)2010,JPO&INPIT |
