ViewLight UNICOS UDR-800P - Maddox Rod Heterophoria Tests; Horizontal Maddox Rod Test

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10.11 Dual Cross Cylinder Test
 Purpose: In subjective test, revise maximum circumference refractive power and axis for
Monocular, using Dual Cross Cylinder
 Chart: Dot-Group Chart
 Auxiliary Lens: Dual Cross Cylinder Lens (DUAL)
 Target: Separated two Dot-Group Chart must be seen same.
 Way of Test
1. On Chart clause of main screen, press Dot-
Group Chart to move on to Cross
Cylinder Mode.
2. Press (R) or (L) to choose the field for test.
3. On the touch screen, touch [CC DUAL] to change it into Dual Cross Cylinder Mode.
4. From the patient’s view, the Dot-Group Chart is separately shown divided as two.
▶ If the left one is seen clearly, turn the dial counterclockwise (+ direction.)
▶ If the right one is seen clearly, turn the dial clockwise (- direction.)
▶ If the patient says there is no difference, finish the test.
5. Press [A] or left/right button to estimate the distorted vision axis.
Press [C] or left/right button to estimate the circumference power.
[Figure 10-11] Dual Cross Cylinder Test (Distorted Vision Axis Test)