Maddox Wing Test

195,00 excl. VAT

The Maddox Wing Test for quick and efficient near test for horizontal, vertical and cyclo-deviations. Differentiation between phoria and tropia must be carried out separately.





The Maddox Wing test is a Handheld device used to measure heterophoria at near. It consists of a septum and two slit apertures, one for each eye. One eye sees a double tangent scale (vertical and horizontal) calibrated to read in prism dioptres, while the other eye sees a white arrow pointing upward and a red arrow pointing horizontally to the left. As the two retinal images are quite different there is no attempt at fusion and the eyes stay in the passive position. The arrows seen by the left eye point to the numbers seen by the right eye. The numbers represent the vertical and horizontal components of the phoria, which can be read directly by the observer.

Specifications Maddox Wing Test

  • Measuring device for checking squint deviations
  • robust, matte black metal frame with horizontal white and vertical red scale
  • incl. measuring glass holder
  • with fold-out handle
  • Article number: 59521

The Maddox Wing instrument consists of a black metal frame with a red and white number scale. The device has a measuring glass holder. The left and right viewing areas are separated by a linkage so that binocular vision is interrupted. When doing this, we recommend tilting the test device slightly downwards so that your eyes are in a normal viewing position for reading at close range.

Further research is needed to differentiate between phoria (latent squinting) and tropia (manifest squinting).

Instructions of use

The patient rests the face-piece on his or her nose and looks through the 2 slits. The upper oblique wing divides the visual field into 2 halves so that the left eye sees the scale towards which the white arrow points and the right eye sees the arrow. The character and degree of the deviation can then be determined at once from the apparent position of the arrow on the scale.

The vertical screen cuts off the red arrow from the left eye and the red vertical scale from the right eye, so that any vertical deviation can be detected rapidly and measured from the apparent position of the red arrow on the vertical scale.

Cyclophoria, if present, can be measured by adjusting the moveable wire forming the shaft of the red arrow until it appears to the patient to be parallel with the horizontal scale. Whan carrying out the Maddox Wing Test the apparatus should be directed downwards so that the eyes are in a position similar to that adopted in near vision under normal every day conditions.