Refraction and muscular imbalance, as simplified through the use of the ski-optometer

by Daniel Woolf

The Maddox Rod

The Maddox rod ([Fig. 14]) consists of a number of red or white rods, which cause a corresponding colored streak to be seen by the patient. This rod is placed most conveniently on the instrument, being provided with independent stops for accurately setting the rods at 90 or 180 degree positions. The Maddox rod has proven of valuable assistance in detecting muscular defects, particularly when used in conjunction with the phorometer. Thus employed, it enables the patient to determine when the streak seen with one eye crosses through the muscle-testing spot-light observable by the other eye, as hereafter described.

Fig. 14—The Maddox Rod,
a valuable aid in making muscular tests.