Maddox rod

The Maddox rod test can be used to subjectively detect and measure a latent, manifest, horizontal or vertical strabismus for near and distance.

[2] Due to the optical properties, the streak of light is seen perpendicular to the axis of the cylinder.

[3] The Maddox rod test should be used in cases of: The method of assessing near and distance fixation is similar.

The Maddox Rod is held in front of the patient's right eye with the cylinders vertical, making the red line horizontal.

Examples of recordings are shown below: MR: sc (F) L/R 5∆ eso 8∆ (FR) MR: sc (F) L/5∆ eso 8∆ (FR) MR: sc (F) 5∆ BD 8∆BO (FR) sc: without correction - F: far - N: near - FR: fixing right - FL: fixing left - BD: base down prisms - BU: base up prisms - BO: base out prisms - BI: base in prisms - eso: esotropia - exo: exotropias - L/R: left hypertropia or right hypotropia - R/L: right hypertropia or left hypotropia The double Maddox rod test can also be used to assess torsion and measure cyclotropias.

Maddox rod and pen torch used in Maddox rod testing
Equipment used in Maddox rod testing. Top left (Maddox rod), top right (vertical base up and base down prisms), bottom left (pen torch) and bottom right (horizontal base out or in prisms)
A) Esodeviation, B) Exodeviation, C) Hypo-deviation, D) Hyper-deviation, E) No deviation
Maddox rod test tutorial
Double Maddox rod test with trial frames