| 摘要 |
The present invention relates to a measuring instrument for establishing the mounting lens angle of a spectacle mount, comprising a support on which the spectacle lens with the upper or the lower groove base may be placed and which presents a marker by which the spectacle lens is oriented, and at least one adjustable means measuring the angle enclosed between the connecting line from the nasal groove base to the temporal groove base of a lens ring, on the one hand, and the marker, on the other hand.
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