| 释义 |
DictionarySeeTangent scaleMaddox cross
Maddox crossA scale for measuring the angle of heterophoria and heterotropia consisting of one horizontal and one vertical line in the form of a cross with a light source placed at the centre of intersection. The lines are graduated in prism dioptres or degrees and calibrated for use at a given distance (usually 6 metres). Syn. Maddox tangent scale. |