| 摘要 |
An optometric apparatus for a subjective binocular visual performance test includes right and left test units including right and left housings, a plurality of optical elements disposed in the housings, and right and left test windows provided to the housings, in which desired optical elements selected from the optical elements are to be placed and through the selected elements, an optotype is presented to examinee's right and left eyes by an optotype presenting apparatus, the apparatus characterized by including right and left polarization plates having polarization axes perpendicular to each other and arranged to be placed in the windows, and right and left protective covers arranged to be placed in the windows at a side facing the optotype presenting apparatus and having polarization optical characteristics of changing circularly polarized light that passes through the right and left protective covers into linearly polarized light having polarization axes perpendicular to each other.
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