Maddox wing

Maddox Wing is a diagnostic tool used in the field of optometry and ophthalmology. It is designed to measure heterophoria and cyclophoria, conditions related to the misalignment of the eyes. The Maddox Wing test is named after its inventor, Ernest Maddox, a renowned British ophthalmologist.

Overview

The Maddox Wing test is a subjective method for measuring the degree of heterophoria and cyclophoria. Heterophoria is a condition where the eyes are misaligned when the visual axes are not converging on a target, while cyclophoria is a type of strabismus where there is a torsional misalignment of the eyes.

The Maddox Wing apparatus consists of a handheld device with a series of numbered prisms. The patient is asked to look through the device at a light source, and the degree of eye misalignment is measured based on the patient's perception of the light's position.

Procedure

During the Maddox Wing test, the patient is asked to hold the device with one eye looking through a hole at the end of a wing, and the other eye looking at a series of numbered prisms. The patient is then asked to align a white line with a red line. The degree of misalignment, measured in prism diopters, indicates the degree of heterophoria or cyclophoria.

Limitations

While the Maddox Wing test is a useful tool in diagnosing heterophoria and cyclophoria, it has its limitations. It is a subjective test, meaning the results depend on the patient's perception. Additionally, it may not be suitable for patients with certain eye conditions, such as nystagmus or severe amblyopia.

See Also

• Prism diopter
• Strabismus
• Amblyopia
• Nystagmus

References

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