| 摘要 |
A measurement device for the mounting of corrective glasses on a spectacle frame. The device has a transparent support for plate 4, the upper part 6 of which is opaque and is provided with a slot 5 acting as an origin for horizontal graduations 4a which are used for the measurement. The device is used for the determination of the height H separating the center of the pupil of the eye from the lowest part 3 of the interior of the spectacle frame circle 2. |
