Potec PDR-7000 - Page 78

PDR-7000 Operation Manual
When a cross is not formed, correct it as follows:
Appearance of chart
Phoria
Correction
1)
Esophoria
Turn the dial clockwise to add the BO prism
powers until a cross is formed.
2)
Exophoria
Turn the dial counterclockwise to add the BI
prism powers until a cross is formed.
3)
Left eye
hyperphoria
Press . Turn the dial clockwise until a cross
is formed. (Add BU to the right eye and BD to
the left eye.)
4)
Right eye
hyperphoria
Press . Turn the dial counterclockwise until a
cross is formed. (Add BD to the right eye and
BU to the left eye.)
5)
Esophoria +
Right eye
hyperphoria
Correct the horizontal phoria in the same
manner as for <1> and the vertical phoria in the
same manner as for <4>.
6)
Esophoria
+
Left eye
hyperphoria
Correct the horizontal phoria in the same
manner as for <1> and the vertical phoria in the
same manner as for <3>.
7)
Exophoria
+
Right eye
hyperphoria
Correct the horizontal phoria in the same
manner as for <2> and the vertical phoria in the
same manner as for <4>.
8)
Exophoria
+
Left eye
hyperphoria
Correct the horizontal phoria in the same
manner as for <2> and the vertical phoria in the
same manner as for <3>.
 Use or instead of the dial for fine adjustment.
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