Maddox wing

Maddox Wing

1. Presented By :-
AmitKumar
Junior Consultant Optometrist
Rama Medical College Hospital & Research Center
Mandhana, Kanpur 209217 (U.P)

2. Maddox wing
Definition
Principal
Procedure

3. It measure’s the amount of “HETEROPHORIA” for near at 33 cm
can be measured.
TheMaddoxWingmeasuresthesizeofheterophorias(latent
deviations)andsmallheterotropias(manifestdeviations)atnear
whennormalretinalcorrespondence(NRC)ispresent.Itis
especiallyhelpfulwhenpatientspresentwithsymptomsof
diplopia(doublevision)withnoapparentcause.

4. It is based on principal of dissociation of fusion by
dissimilar objects of near Phoria.

5. Itisdesignedinsuchwaythatwhenpatientlook
throughtheeyepiece.
Righteyeseesaverticalwhitearrowandhorizontal
red arrow.
Lefteyeseesaverticalandhorizontallineofnumbers.

8. The Handle:
The handle is retractable and is located at the base of the instrument. This is where the
patient holds the apparatus.
The Eye Piece:
Located anteriorly, the eye piece is where the patient looks into.
The Eye-piece lens holder:
Mainly used to hold lens for patients who have difficulties seeing the board with their
glasses
The Septa:
There are 2 septa that separates the eye piece so that the patient has two separate fields
of view.
The Scale Card:
Used to measure the deviation of heterophorias, small heterotropias(with NRC) and
also torsion. The scale card has the horizontal, vertical and torsionalscales. The board
also contains the red and white arrows. This will be further discuss throughout the
video.
The Torsion Lever:
On the measuring board there is an adjustable lever which the patient subjectively aligns
to measure torsion.

9. Askpatient:-
Whilearrowispointingatwhichnumberof
horizontalline.
Redarrowispointingatwhichnumberofvertical
line.
ForCyclophoriaaskpatienttoaligntheredarrow
withthehorizontallineofnumber.

10. ForCyclophoria,slidethearrowwhichoverlapsthe
edgeofthechart,untilitappearsparallelwith
Thewhitelineabove.
Shouldthearrowrecordabovezerothescale
indicatestheamountofcyclophoria,ex-
cyclophoria.

12. The test is much more reliable because patient have
to accommodation to see number clearly.
Horizontal,verticalandcyclophoriascanbe
measuredsimultaneously.
Handheldinstrument.
Notadifficultskilltolearn.
Canbeusedonchildren.

13. Theinterpupillarydistanceisnotadjustable.
ItispurelySubjectivetest.
Cannitbedoneispatientwithaccommodationdeficiency
(Pseudophakia).
Cannotbeperformedinthedistance.
Contraindicatedwhereabnormalretinalcorrespondence
(ARC)orsuppressionarepresent.