| 摘要 |
A vision evaluation device which measures the three vision parameters of stereoscopic vision, fusion testing, and fusion recovery measurement. The device comprises a stereo-pair of images in constant view through the eye pieces of a lighted View Master TM slide viewer. Two viewers are utilized, with the viewers using identical "4-Dot" stereo pairs but differing in that the right and left images are transposed. A reel mount in the View-Master viewer is mounted with a graded series of neutral density filters, with the filters being arranged so that the filter density increases over one eye as the reel is advanced with a lever, until the color of the solid circle changes. Use of the two viewers permits ready identification of an eye with nerve conduction defect, with one viewer measuring right eye defects and the other measuring left eye defects.
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