Maddox rod is the group of either red or colorless parallel glass rods together act as a cylinder to detect muscle imbalance.
The Maddox rod check can be accustomed subjectively to observe and live a latent, manifest, horizontal or vertical abnormalcy for near and distance. The check is predicated on the principle of diplopic projection.
Maddox Rod consists of a series of urban center cylinder lenses about three millimeter in diameter, mounted in an exceedingly trial frame lens or in an exceedingly refactor head .A spot of sunshine viewed through the Maddox Rod seems as elongated streak. The Maddox Rod is usually red in color.