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Uploaded byRizwan Sajjad Chachar
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Maddox rod n wing

This document provides information about the Maddox rod and Maddox wing, which are used to measure eye alignment and phoria. The Maddox rod consists of cylindrical lenses available in red and white, and is used at distances of 3m and 6m to measure horizontal and vertical distance phoria by having one eye view a line while the other views a spot. The Maddox wing is used at 33cm to measure near phoria by having the eyes view dissimilar images of arrows pointing to a scale. The procedures for each are described. References for more information are also provided.

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MADDOX ROD AND MADDOX WING
OUTLINE  Maddox Rod Defination Principle Procedure  Maddox wing Defination Principle Procedure  Refrences
MADDOX ROD Consists of series of plano- convex cylindrical lenses. Available in Red and White Colour. Used in diagnosis of ExtraOcular Imbalance.
MADDOX ROD PRINCIPLE “Dissociate two dissimilar objects by breaking the fusion to find out the PHORIA for distance”
MADDOX ROD PROCEDURE  Room illumination dim.  Can be done at 3m and 6m.  Maddox rod is placed in RE.  Provide spot of light target at distance.  RE views a LINE image, while LE views a SPOT OF LIGHT.
MADDOX ROD  HORIZONTAL DISTANCE PHORIA Uncrossed (Esophoria) Crossed (Exophoria)  VERTICAL DISTANCE PHORIA (Hyperphoria) (Hypophoria)
A=Esophoria B=Exophoria C=Hypophoria D=Hyperphoria E=Orthophoria
MADDOX WING  Instrument by which amount of phoria for near at (33cm) can be measured.
MADDOX WING PRINCIPLE “To dissociate two dissimilar images of near phoria”
MADDOX WING PROCEDURE I. It is quantitative and subjective method II. The right eye sees red and white arrow each of which point to scale with number seen by the left eye III. The room should be brightly illuminated and patient should be optically correected IV. The examiner instructs the pateint to hold the maddox wing and identify the number that the white vertical arrow and red horizontal arrow .
REFRENCES  Elkington  Basic opthalmology Renu jogi
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