The invention includes an optical main frame, a pupil line of sight measuring frame and a telescopic adjusting component.The optical main frame has two lenses corresponding to the binocular line of sight, the pupillary line of sight measuring frame has two pupillary line of sight measuring parts, each pupillary line of sight measuring part has a line of sight measuring hole, which can be consciously adjusted.The telescopic adjusting assembly is pivoted between the optical main frame and the pupil sight measuring frame to adjust the distance between them.Thus, when the eye line of two eyes passes through two lenses and two sight measuring holes respectively, and one sight mark is viewed, the structure of the pupil distance of two eyes and the geometric center distance of two circular frames can be obtained through the calculation of similar triangles.Therefore, this case has the advantages of self-conscious pupillary distance measurement, which is more in line with the actual visual experience, does not need high equipment cost, and can calculate the distance of the eyeball rotation center.本發明係包括一光學主架、一瞳孔視線測量框架及一伸縮調整組件。光學主架具有對應雙眼視線之二鏡片，瞳孔視線測量框架具有二瞳孔視線測量部，每一瞳孔視線測量部具有一視線測量孔，其可被自覺性調整。伸縮調整組件樞設於光學主架與瞳孔視線測量框架之間，用以調整其間之距離。藉此，當雙眼之視線分別經二鏡片、二視線測量孔，觀看一視標，係達成可透過相似三角形之推算得到雙眼之瞳孔距離及二圓框部兩幾何中心距離之結構。故，本案達到兼具自覺式瞳孔間距量測較符合實際視覺感受、不需高昂設備成本低，及可計算出眼球旋轉中心距離等優點。
